Ukraine’s president is pushing for an immediate truce. European leaders have said they will would impose new sanctions on Moscow if Russia’s president does not accept.
The attacks came a day before a Russian-proposed cease-fire was to take effect and as Moscow prepared to welcome foreign dignitaries for a parade.
The volley came just days before a planned parade in the capital to mark the 80th anniversary of the end of World War II in Europe.
Russian strikes and fighting along the front line have killed far more civilians than over the same period a year ago, U.N. officials said in a presentation for diplomats in New York this week.