KYIV: Russian forces launched a barrage of 367 drones and missiles at Ukrainian cities overnight, including the capital Kyiv, in the largest aerial attack of the war so far, killing at least 12 people and injuring dozens more, officials said.

The dead included three children in the northern region of Zhytomyr, local officials there said.

Ukrainian President Volodymyr Zelenskyy called on the United States, which has taken a softer public line on Russia and its leader, Vladimir Putin, since President Donald Trump took office, to speak out.

"The silence of America, the silence of others in the world only encourages Putin," he wrote on Telegram.

"Every such terrorist Russian strike is reason enough for new sanctions against Russia."

It was the largest attack of the war in terms of weapons fired, although other strikes have killed more people.

Interior Minister Ihor Klymenko said 12 people had been killed and 60 more wounded. Earlier death tolls given separately by regional authorities and rescuers had put the number of dead at 13.

"This was a combined, ruthless strike aimed at civilians. The enemy once again showed that its goal is fear and death," he wrote on Telegram.