An ammunition depot has been hit during a Ukrainian drone attack on Dzhankoi in Crimea, with Russian air defence forces shooting down or electronically jamming 11 drones over the area, a Russian-installed official said.
Sergei Aksyonov, the Russian-installed governor of the Crimean Peninsula that Moscow annexed from Ukraine in 2014, also said that a residential building was damaged in the area.
He said there was no indication of any casualties, but people within a five kilometre radius of the incident were being evacuated.
It was not immediately clear whether the ammunition depot was directly hit by a drone or if it was damaged by falling drone debris.
Russia has a military air base near Dzhankoi. Ukrainian officials have long said the city and surrounding areas have been turned into Moscow's largest military base in Crimea.
Aksyonov also said on the Telegram messaging app that "for safety reasons" railway and road traffic in the area was suspended.
Reuters could not independently verify the reports of the attacks. There was no immediate comment from Ukraine on the alleged attack.
Ukraine rarely publicly claims responsibility for attacks inside Russia or on Russian-controlled territory in Ukraine, but has been saying in recent months that destroying Russia's military infrastructure helps Kyiv's counteroffensive.
It was the second such attack in three days in Crimea. On Saturday, Aksyonov said a drone caused an explosion at an ammunition depot in central Crimea, prompting authorities to evacuate nearby people and briefly suspend road traffic on the bridge linking the peninsula to Russia.
Ukraine did claim that incident, saying its army had destroyed an oil depot and Russian army warehouses.
Meanwhile, Russia's Federal Security Service (FSB) said on Monday that it had found traces of explosives on a ship travelling from Turkey to the port of Rostov-on-Don in Russia to pick up grain.
The FSB said the ship had been docked in the Ukrainian port of Kiliia in May, and that it may have been used to deliver explosives to Ukraine.
It said the ship had changed its name while in the Turkish port of Tuzla earlier this month and replaced its crew, which had consisted of 12 Ukrainian nationals.
"These circumstances may indicate the possibility of using the foreign civilian ship to deliver explosives to the territory of Ukraine," it said.
The vessel, which it did not name, had been inspected in the Kerch Strait and was banned from continuing its journey, after which it left Russian waters, the FSB said.
Reuters could not immediately confirm the details of the FSB statement. It came one week after Russia pulled out of an agreement that had enabled Ukraine to export grain from its Black Sea ports, with ships undergoing security inspections.
