India, Jan. 28 -- A heavy Russian drone bombardment of Ukraine's southern city of Odesa injured 23 people, including two children and a pregnant woman, officials said on Tuesday as Ukrainian President Volodymyr Zelenskyy called for US efforts to end Russia's almost 4-year-old invasion of his country to move faster.

The Odesa attack involved more than 50 drones, some of them models recently upgraded by Russia to improve their range and strike power, according to Ukrainian authorities. The drones targeted the power grid, which Russia has repeatedly bombarded during the coldest winter in years, and also hit five apartment blocks, officials said.

"The rescue operation will continue until the fate of all people who may be under the rubble is...