Russian attacks on Ukraine killed at least 22 people on Tuesday, including 12 in one of the worst strikes so far this year, as the deadline approached for a proposal from Kyiv for an open-ended ceasefire to begin at midnight.

Russia announced a ceasefire for May 8-9, dates when it commemorates the Soviet Union victory over Nazi Germany in World War Two and holds a military parade.

Ukraine, in response, announced a proposal for an open-ended ceasefire starting at midnight on Wednesday, urging Russia to reciprocate. President Volodymyr Zelenskiy said it was not an option for Russia to halt strikes for one day for its military parade while having heavily pounded Ukraine.

At least 12 people were killed in the city of Zaporizhzhia, emergency services said on the Telegram app. According to the regional governor Ivan Fedorov, at least 16 more were injured.

Residential buildings, a car repair service and a car wash were damaged in the attack, he said. The attack also sparked fires at a shop and an unidentified enterprise, he added.

Images from the site that he shared showed a heavily damaged building with billowing flames and smoke. Cars are seen burning as first responders help bloodied people leave the site.