Russian airstrikes on a prison and hospital in southeastern Ukraine killed at least 19 people, officials said on Tuesday, while U.S. President Donald Trump said he would start imposing punitive measures on Russia within 10 days if Moscow showed no progress toward ending its war in Ukraine.

Russian forces overnight attacked dozens of Ukrainian cities, killing at least 22 people and injuring 85 others, officials said Tuesday.

Kremlin spokesman Dmitry Peskov claimed Russia would prefer to resolve the conflict through dialogue, but said military operations continue because "opponents rejected the path of negotiations."

A 23-year-old Ukrainian woman who was expecting her first child after suffering several miscarriages was among the 21 people killed after a Russian airstrike hit her hospital ward overnight, her

Four powerful Russian glide bombs hit a prison in Ukraine’s southeastern Zaporizhzhia region early on Tuesday, authorities said.

Mr. Trump said on Monday that he would give Russia about 10 to 12 days to end the war before implementing a new round of penalties against Moscow. The Kremlin offered little reaction.