At least 15 are dead and 46 injured in a series of rocket attacks in the Ukraine.
Pro-Russian rebels fired explosives on a residential district of the government-held port.
They've vowed to step up their campaign against the Kiev government.
More than 5 thousand people have died in fighting in the east since April.
Director of Medecins Sans Frontieres Ireland Jane-Ann McKenna says health care facilities need to be protected: