More than 600 drones have attacked Moscow since last night.

Axar.az reports, citing Russian media, that all flights at Moscow’s Vnukovo, Sheremetyevo, Domodedovo and Zhukovsky airports were delayed due to the drone attack.

TASS reported that eight flights were unable to land in Moscow for security reasons.

Moscow Mayor Sergei Sobyanin also confirmed that more than 600 drones had targeted Moscow since yesterday:

“From last evening until this morning, 620 drones flew toward the Moscow region, 180 of which were destroyed in the Moscow region. Emergency services are working at the crash sites.”

Russian media described the drone attack on Moscow as the largest attack in the past two years.