At least four people died overnight as Russian drone and missile strikes continued to pound Ukraine’s towns and cities, local officials said Saturday. Meanwhile, Moscow’s troops continued their grinding advance through the country’s east.

President Volodymyr Zelenskiy said the attack underscored again the need to strengthen Ukraine's air defences. Odesa regional governor Oleh Kiper said seven people were injured and emergency crews remained at the scene.

Russian forces launched missile strikes on Odesa’s historic center on the evening of Jan. 31, injuring at least two people, Mayor Hennadii Trukhanov said.

A Russian missile attack struck the centre of the southern Ukrainian city of Odesa on Friday evening, wounding at least seven people and damaging historic buildings, officials said.

Russia launched a barrage of drones and missiles on Ukraine on Saturday, killing at least four civilians and damaging residential buildings and infrastructure across the country, Ukrainian officials said.

Russia launched a barrage of drones and missiles on Ukraine on Saturday, killing 15 people and damaging dozens of residential buildings as well as energy infrastructure across the country, Ukrainian officials said.

Poland scrambled fighter jets and put its ground-based air defense system on "the highest state of readiness" Saturday morning.

Russia launched hundreds of strikes on Ukraine. Specifically, the occupiers fired nearly 50 missiles in seven days, according to a post on Telegram by Ukrainian President Volodymyr Zelenskyy. According to him,