Sevastopol's Moscow-backed administration said that the Black Sea Fleet's air force shot down a drone and there were no casualties. A number of attacks have hit Crimea over the past weeks.

An explosion was reported near the staff building of the Black Sea Fleet in Sevastopol, local Governor Mikhail Razvozhayev said.

Razvozhayev said that the fleet's air forces shot down a drone.

"It dropped onto the roof and burned," he said, adding that there were no casualties. Sevastopol's Moscow-backed governor urged residents to "keep calm and stay home for the next hour if possible."

According to Razvozhayev, a drone had already hit the building's courtyard at the end of last month, bringing about casualties. Ukraine has denied involvement in the attack.

A Russian ammunitions depot exploded in the north of the peninsula this week, with Moscow blaming "saboteurs." Drones were also allegedly shot down over the city of Kerch, which is linked to Russia by the Crimean Bridge. Kyiv did not claim responsibility for the attacks, but said that further blasts were expected in the future.

Blasts were also heard yesterday near the Belbek air base in Sevastopol.

Early last week, several major explosions were heard at the Saky air base near Novofedorivka on the peninsula's western coast. Both Kyiv and Moscow denied Ukrainian involvement, with Russian authorities claiming the explosions were the result of an "accident" after munitions caught fire.

Sevastopol has been under Russian occupation since Moscow annexed the Crimean Peninsula in 2014. The city is located in Crimea's southwest, but is governed separately from the rest of the peninsula.

DW