A Russian bomb attack on a penal colony in southeastern Ukraine killed 17 people overnight, officials said, hours after U.S. President Donald Trump said he would shorten a deadline for Vladimir Putin to make peace, Reuters reported.

Dozens more were wounded in the attack on the front-line Zaporizhzhia region, according to President Volodymyr Zelenskiy, who described the bombing as "deliberate".

"And this was done after a completely clear position was voiced by the United States."

Zelenskiy added that a total of 22 people were killed in overnight strikes by Russia, including a 23-year-old pregnant woman who died in a missile strike on a hospital in another southeastern region, according to Reuters.