Ukraine struck a critical Russian military-industrial site overnight on July 5 that produces components for high-precision weapons used by Moscow to attack Ukraine, the General Staff of Ukraine's Armed Forces reported.

The site in question is JSC VNIIR-Progress, a Russian state institute that specializes in developing electronic warfare (EW) systems, including the Kometa antenna arrays, used to jam satellite, radio, and radar signals.

The institute is located in Cheboksary, Chuvash Republic, about 1,200 kilometers (745 miles) away from the Ukrainian border.

The Kometa antenna is used in Shahed-type drones, Iskander-K cruise missiles, and guided aerial bomb modules — all high-precision weapons used by Russia to strike civilian and military targets across Ukraine.

The General Staff confirmed that Ukrainian weapons reached the target area but said final damage assessments were still underway.

The VNIIR-Progress institute has been sanctioned by both the United States and the European Union for its role in supporting Russia's war effort.

The Iskander-K is a precision-guided cruise missile with a range of up to 500 kilometers (311 miles), frequently used by Russia to target civilian areas. Shahed drones have become a central part of Moscow's airstrike tactics since late 2022 due to their low cost and high payload.

Located on the Volga River, Cheboksary is the capital of the Chuvash Republic and lies deep inside Russian territory. Russian independent media outlet Astra and local Telegram channels earlier reported explosions in the city overnight.

Russia's Defense Ministry claimed to have shot down two drones over the region.

This marks the second known Ukrainian drone strike on VNIIR-Progress. On June 9, explosions and fires were also reported at the facility following another drone attack.

Russia's largest airports experienced hours-long flight delays and cancellations on July 5, as authorities imposed temporary restrictions due to a reported threat of Ukrainian drone attacks, the pro-Kremlin Telegram channel Shot reported.

Ukraine hasn't commented on the report. Kyiv's drone campaign, which has increasingly disrupted civilian air travel in Russia, is part of Ukraine's broader strategy to undermine Russia's logistics far beyond the front line.

Some passengers in Russia reported waiting more than 10 hours on July 5 as their flights were being delayed, according to Shot.

Departures at Moscow's Sheremetyevo Airport were halted for several hours, delaying over 20 flights. At St. Petersburg's Pulkovo Airport, roughly 50 flights were delayed and more than 20 canceled.

Leningrad Oblast Governor Alexander Drozdenko said that two drones were shot down south of St. Petersburg, prompting a temporary suspension of operations at Pulkovo Airport.

The disruptions followed a wave of Ukrainian drone attacks overnight, which targeted military and industrial infrastructure in at least six Russian regions.

The Russian Defense Ministry said it intercepted 42 drones within three hours, mainly over the Belgorod, Bryansk, and Kursk oblasts near the Ukrainian border.

Novaya Gazeta Europe reported in May that at least 217 temporary airport closures have occurred across Russia since Jan. 1 due to drone threats, more than in 2023 and 2024 combined.

A similar wave of strikes ahead of Russia's Victory Day in May led to massive delays, affecting an estimated 60,000 travelers.

Ukraine’s new drone strategy — cripple Moscow’s airports, make Russian population ‘pay’

Hundreds of Ukrainian kamikaze drones have flown towards Moscow in recent weeks. None appear to have even reached the Russian capital, yet the effect on the city — and the wider country — has been hugely significant. Ukrainian drones have forced at least 217 temporary airport closures across Russia since Jan. 1,

The Kyiv IndependentTim Zadorozhnyy