Russia stepped up its bombardment of Kyiv on Tuesday, smashing apartments and a subway station, while civilians in 2,000 cars fled Mariupol along a humanitarian corridor in what was believed to be the biggest evacuation yet from the desperately besieged seaport.
On the diplomatic front, another round of talks began between Russia and Ukraine via video, and the leaders of three European Union countries — including Poland, a NATO member on Ukraine's doorstep — planned a visit to the embattled capital in a bold show of support.
