Russia’s defense ministry claims to have foiled a Ukrainian drone strike after shooting down two drones above Moscow.

Two more drones were seized over the Bryansk region, north of the Ukrainian border, according to the report.

Flights to and from Moscow’s airports were briefly halted early Tuesday, according to the ministry.

As allegations of drone strikes becoming increasingly common, airspace over Moscow has been blocked many times in recent days.

A Russian warplane also destroyed a Ukrainian surveillance boat in the Black Sea that was sailing near Russian gas production facilities, according to the defense ministry.

Early on Tuesday, Moscow’s Mayor Sergei Sobyanin said Russian air defences had shot down two drones to the west of the capital in the Krasnogorsk and Shastsy districts.

No injuries were reported in the attacks and Ukraine has not commented.