Ukrainian air defenses thwarted an intense Russian air attack on Kyiv early Tuesday, shooting down all 18 missiles aimed at the capital, officials said.

Loud explosions boomed over Kyiv as the nighttime attack combined Russian missiles launched from the air, sea and land in an apparent attempt to overwhelm Ukraine’s air defenses. No casualties were reported as Western-supplied weapons helped fend off the assault.

The barrage came as European leaders sought new ways to punish Russia for the war and a Chinese envoy sought traction for Beijing’s peace proposal.

Russia’s latest attack on Kyiv was “exceptional in its density — the maximum number of attacking missiles in the shortest period of time,” said Serhii Popko, the head of the Kyiv military administration.