Ukraine said the strike hit a rail car repair works, while Moscow said it had destroyed tanks sent by Eastern European countries to Ukraine.
For Natalia Zinets's latest contributions to The Japan Times, see below:
U.S. House of Representatives Speaker Nancy Pelosi, meanwhile, became the latest Western official to visit Kyiv in a show of support for Ukraine.
The siege of the city has been the worst humanitarian catastrophe of the conflict, and has been described by Kyiv as a war crime.
Pavlo Kyrylenko, governor of the Donetsk region, said thousands of civilians had been at the station at the time the rockets struck, in what he described as a deliberate attack.
The besieged southern port of Mariupol has been under almost constant bombardment since the early days of the invasion that began on Feb. 24.
In a hint of a possible compromise, Zelenskyy said that Ukraine was prepared to accept security guarantees from the West that stop short of its long-term goal of joining NATO.
Air raid sirens wailed over the capital of 3 million people, where some residents sheltered in underground metro stations.
Russian forces have captured the Chernobyl former nuclear power plant, 90 km north of the capital, and Hostomel airport in the Kyiv region.