Russia fired more than 100 drones and two ballistic missiles at Ukraine overnight, the Ukrainian air force said Tuesday, as the country’s foreign ministry noted that Moscow’s recent threat to hit Kyiv especially hard from the air brought nothing new.

Russia on Monday (local time) urged foreign citizens, including members of diplomatic missions, to leave the Ukrainian capital as quickly as possible and told residents to steer clear of military and government facilities. It said that “systemic strikes” on Kyiv were being prepared.

Russia has regularly bombarded Kyiv, often causing dozens of civilian casualties with every attack, since it launched an all-out invasion of neighbouring Ukraine on February 24, 2022.

Russia's Foreign Minister Sergey Lavrov told US Secretary of State Marco Rubio by phone Monday that the US should evacuate its diplomatic staff from Kyiv, a foreign ministry statement said. Rubio didn’t say whether the US State Department would take that step, but expressed concern during a trip to India that the “terrible” war in Ukraine could escalate further.

The Trump administration has tried for more than a year to stop the war. But its efforts yielded no significant breakthrough and are now on ice as Washington focuses on the Iran war.