Six Ukrainian troops were killed in two separate incidents in the troubled east Sunday as isolated clashes continue to violate a fragile ceasefire to end the year-long war

Six Ukrainian troops were killed in two separate incidents in the troubled east Sunday as isolated clashes continue to violate a fragile ceasefire to end the year-long war, officials said.
  
Four soldiers died when their vehicle came under missile fire while crossing a bridge near Lugansk, while two others were killed in the explosion of an anti-tank mine outside the port city of Mariupol, army spokesman Oleksandr Motuzyanyk told AFP.