Russia-backed rebelsc

9 dead as shelling increases in eastern Ukraine

The fighting between Russia-backed separatist rebels and Ukrainian government troops in the country's industrial heartland eased after a truce was signed in February. But despite pledges to withdraw heavy caliber weapons from the front lines, both sides seem to be engaged in recent heavy fighting.

The conflict has killed an estimated 6,400 people since April 2014, according to the United Nations.