Artillery shells hit close to the city centre of the rebel-held city of Donetsk in eastern Ukraine, Reuters news agency reports.
People poured out of their offices onto the stairwell of the city's main administration building after loud explosions nearby triggered an evacuation warning. There were at least two further blasts near the city, the first time artillery shells have hit the area.
More top news
Spring takes a hike - for the time being
A number of Britons are feared stranded on Mount Everest after the Nepal earthquake triggered a deadly avalanche on Saturday.
Prime Minister defends royals' decision to give birth in a private hospital - instead of going with the NHS