For the 10th time this month, a Russian airstrike targets Kiev.

Russia has launched another widespread overnight missile and drone strike against cities across Ukraine, including the capital Kyiv, for the 10th time this month, Ukrainian officials said Friday.

At least three cruise missiles and six attack drones managed to evade air defenses, according to the Ukrainian Air Force. There was no immediate information on casualties or what was hit. The airforce said in a statement that three cruise missiles and 16 Iranian-made Shahed-136 drones had been intercepted, and local officials in Lviv said five of them were above their region, in western Ukraine.

Air raid sirens interrupted the night in the capital Kiev for the second time in 24 hours. The attack drones came in “several waves” at short intervals, according to the city’s military administration, which said they were all shot down.

“Strikes on Kiev were not allowed!” it wrote in a statement on the Telegram messaging app.

The strike came a day after Ukrainian air defenses shot down dozens of Russian missiles in the skies over Kiev, throwing flaming debris over the city. Later on Thursday, an explosion derailed a Russian freight train in Crimea. the latest in a series of explosions in Russian-occupied territory.

The rocket attacks and explosion in Crimea come as both Russia and Ukraine prepare for a widely anticipated Ukrainian counter-offensive to retake occupied land.

In anticipation of that campaign, Russia has fired salvo after salvo of long-range missiles, apparently in an attempt to tie down Ukraine’s air defenses away from the front lines. And recent explosions in Crimea fit into a pattern of strikes on Russian railways, supply lines, fuel depots and ammunition depots that analysts say are part of a Ukrainian campaign to hinder the Russian war machine and sow instability ahead of the offensive.

Kiev has been targeted by what a Ukrainian official called after months of relative calm an “unprecedented” series of attacks in recent weeks the limits of the capital’s air defenses have been tested. US officials said earlier this week that a Patriot missile system defending the city from ballistic missiles had been damaged by a Russian barrage of hypersonic Kinzhal missiles, though US officials said the system remained operational.

Securing additional air defense systems is one of the “priorities for this week, next week and for the foreseeable future,” Ukraine’s President Volodymyr Zelensky said. said in his overnight address. The Ukrainian leader is expected to take part in Japan’s Group of 7 summit this weekend, the last in a series of recent international trips aimed at securing more weapons and aid.

Andrew E. Kramer And Victoria Kim reporting contributed.