Russian authorities left residents in and around Moscow without air raid sirens or phone alerts during Ukraine's largest combined strike on Moscow Oblast, apparently to guard turnout at Russia's parliamentary elections, the Institute for the Study of War (ISW) said. The silence angered residents and even pro-war commentators as a major oil refinery burned.

For most of this war, Russia has handled strikes on its cities as a routine to be announced, warned about, and waited out. Withholding warnings during the heaviest raid yet, in the middle of a national vote, suggests authorities will trade residents' safety for the look of a calm election when a political milestone is on the line.

Sirens stayed off during the biggest raid

Ukraine hit strategic sites across the Moscow area overnight on 19-20 September, the last day of Russia's State Duma vote. Moscow Oblast officials did not switch on air alert sirens or send the SMS warnings they had used during far smaller attacks. They quietly restricted mobile service without major public notice. Ukraine struck oil and logistics targets, not polling stations, according to the experts, and authorities appeared to place high turnout above protecting civilians.

Moscow Oblast residents complained that no alert reached them, some posting on the Telegram channel of regional Governor Andrei Vorobyov before it closed comments. A prominent Kremlin-linked military blogger attacked the official response, saying it erodes public trust and that cutting mobile service does "not really help."

What the drones hit

Ukraine's General Staff reported striking the Gazpromneft-Moscow Oil Refinery in the city's Kapotnya district, one of Russia's largest plants, causing a large fire. Ukrainian manufacturer Fire Point said its FP-1 drones completely shut down the refinery, with all primary processing units damaged.

Governor Andrei Vorobyov claimed air defenses countered 249 drones across 17 municipal districts. The strike was part of Ukraine's widening campaign against the fuel sector funding Russia's war, with about a fifth of Russian refining capacity offline.

Poland will have more than 1,000 automated warning sirens in Lublin Voivodeship by the end of 2026, Interior Minister Marcin Kierwiński said on 19 September, up from nearly 350 now. The region had about 30 remotely activated sirens at the beginning of 2024.

The expansion comes as Russian attacks on the west of Ukraine are reaching closer to Poland. Prime Minister Donald Tusk said Russia is expected to intensify attacks on Ukraine's critical infrastructure and warned of possible "accidental" drone or missile strikes on NATO countries, including Poland. He also said Russia is introducing jet-powered drones that move much faster and at higher altitudes.

Sirens sound as drones approach the border

A Russian air attack on western Ukraine triggered air-raid warnings in Poland's Lublin and Podkarpackie regions on 17 September. Sirens sounded in Lublin and Rzeszów, while residents received an SMS warning: "ATTENTION! ATTENTION! ATTENTION! Threat of an air attack. Find a safe place. Follow the instructions of the emergency services. Await further announcements."

The Polish military said its aircraft were activated in response to Russian strikes involving jet-powered drones against western Ukraine. A Russian drone flying toward Poland fell on Ukrainian territory about four kilometers from the Polish border, according to Polish authorities. Polish airspace was not violated.

Airports in Lublin and Rzeszów temporarily suspended operations to give military aircraft freedom of movement. Polish authorities said the measures were preventive and intended to protect Polish airspace.

More strikes on the border zone

On 13 September, Russian strikes near the Yahodyn-Dorohusk border crossing damaged a gas station and hit the locomotive of a Kyiv-Warsaw passenger train about two kilometers from the Polish border. No deaths were reported, and the border crossing temporarily halted operations.

On 19 September, Poland again activated ground-based air-defense systems and increased radar reconnaissance in response to another wave of Russian strikes on Ukraine. The operation ended the same day with no violation of Polish airspace recorded.

Shelters, sirens, and a 1939 echo

Beyond sirens, authorities have marked nearly 3,500 official shelter locations in Lublin Voivodeship. More than 500 State Fire Service stations and volunteer fire units took part in special exercises on 19 September to practice responses to warning signals and emergency alerts.

"We are building a civil-protection system virtually from scratch," Kierwiński said at a briefing in Lublin. "We have very, very little time."

The 17 September strikes fell on the anniversary of the Soviet Union's 1939 invasion of Poland. Prime Minister Donald Tusk described the Russian attack as "massive, extremely brutal."

The 13 September strikes near the border also drew a response from Kyiv. Foreign Minister Andrii Sybiha described them as Putin's terror "knocking" directly on the doors of the EU and NATO and called for a "full trade embargo, a total entry ban, and complete sanctions against Russia's military-industrial complex."

For the first time, Ukraine has dropped ground robots behind Russian lines from the air. The 3rd Army Corps, behind the mission, says its heavy drones delivered kamikaze unmanned ground vehicles more than 10 kilometers into the Russian rear during the "second season" of Operation Vivaldi, letting Ukrainian troops flank them and clear another 40 square kilometers.

Vivaldi is the counteroffensive the corps is running near Lyman in northern Donetsk. Over its first two "seasons," the 3rd Army Corps and attached units have retaken more than 125 square kilometers, half of it de-occupied outright, and inflicted more than 3,000 casualties on Russian forces.

The operation, run under an information blackout for months, has also disrupted Russia's push and, the Institute for the Study of War found, its plan to encircle the fortified belt of Donetsk cities.

Brigadier General Andrii Biletskyi, corps commander, has said the operation, which he named after Vivaldi's Four Seasons, will run through four phases, and only two have been completed. The air-dropped robot is the newest report on how the corps fights.

Machines go first, infantry follows

The corps casts the tactic as a means of expending robots rather than people.

"In assault operations, drones and ground robots always go ahead of the infantry," Biletskyi says.

The 3rd Army Corps was the first in the world to begin air-dropping ground robotic systems. Our heavy bombers deliver kamikaze robots more than 10 kilometers into the Russian rear.

Wars are won by infantry, one of the corps' soldiers added, "but we protect ours, so the robots go to the enemy first."

A dome hides the assault

As the assault groups advanced amid the operation, Ukrainian air defense and electronic warfare threw a protective dome over the battle area, blinding Russian drones so they could not read the operation's design.

Meanwhile, artillery and strike drones hit command posts, communications nodes, logistics, crossings, and reserves, letting Ukrainian units dig in on the ground they had taken.

On the Lyman axis, the corps says it freed the villages of Shandryholove and Derylove and took control of Drobysheve, and that Vivaldi has kept Russia from shifting significant forces to the Kupiansk front.

Russia is quietly moving to expand the capacity of the plant behind its long-range attack drones, a step that could sharply raise how many it launches at Ukraine, according to Politico. The plan turns on a single carbon fiber factory in Russia's Tatarstan region and runs to the end of the decade.

These files add something narrower than Russia's known intent to fight on: they identify carbon fiber as a critical material capping how many drones it can build. To break that cap, the Kremlin is funding production lines that will not run until the decade's end—a bet on winning by out-building Ukraine, even as the strikes grind on.

The bottleneck Russia wants to break

Politico obtained internal documents from Russian state nuclear corporation Rosatom showing its Alabuga-Volokno plant would add 500 tons of military-grade aerospace carbon fiber a year by 2029. Rosatom declined to comment. Weapons expert David Albright, who heads the Institute for Science and International Security, estimated that volume could yield airframes for about 28,000 more attack drones a year—a 78% jump.

Ukraine already estimates Russia can build more than 36,000 Shahed/Geran kamikaze drones a year. Carbon fiber is the choke point: it keeps the airframes light and strong, and Russia has no cheap substitute.

"Without the carbon fiber, they can't make the drone. Can't substitute for the carbon fiber in the drone and keep its weight down," Albright said.

Moscow is investing in the raw material, not just more assembly halls—the fiber, not floor space, is what caps output.

Ground already cleared in Tatarstan

Documents gathered by the Ukrainian Security and Cooperation Center describe a new factory on the site designed to produce UMT42S-3K aerospace-grade fiber. Satellite images from May to July show land cleared for construction. Albright's own August imagery shows foundations going in. He said the stated 2027 completion date "requires rapid construction." Russia has spent the past year adding new assembly halls at the same site.

The plant and its parent, Rosatom's Umatex Group, already sit under US, UK, and other Western sanctions. The US House Select Committee on China and the Ukrainian government both verified the documents, officials told Politico.

The push comes as Russia leans harder on jet-powered Shaheds, which Ukraine's Air Force says are hard to down with conventional defenses. Kyiv has fielded its first jet interceptor and tested a new one in September—but the plant is a bid to out-build those defenses faster than Ukraine can scale them.