Artillery fire kills civilians in Ukraine

Artillery fire has killed at least four people in a residential area in eastern Ukraine, spurring more people to flee the besieged city of Donetsk and its suburbs.

Pro-Russian insurgents last week retreated from the strategic city of Slovyansk and holed up in Donetsk, a city of one million, and potentially the final frontier for the rebels. The overnight artillery strike in Maryinka, a western suburb of Donetsk, hit four apartment blocks near a rebel base. It was unclear which side fired at the buildings.