Apparent shelling heard outside Ukrainian port
Witnesses in the Ukrainian port city of Mariupol reported sustained explosions outside the city and a volunteer battalion of Ukrainian fighters says Grad rockets were fired at its positions late Saturday, little more than a day after Ukraine and Russian-backed separatist rebels signed a cease-fire following more than four months of fighting in the country's east.
The cease-fire had appeared to largely been holding during much of the day. But late Saturday, witnesses in Mariupol told The Associated Press by telephone that heavy explosions were coming from the city's eastern outskirts, where Ukrainian troops retain defensive lines against the rebels.
