Donetsk health authority says 14 people died in overnight violence , 32 were injured . Ukrainian President says 13 soldiers were killed in Donetsk ; a 14th soldier died in Luhansk . Ukraine PM calls emergency U.N. intervention , accuses Russia of trying to derail election . NATO chief says there may be signs Russia is preparing to pull back forces from border area .
Donetsk health authority says 16 people died in overnight violence , 32 were injured . Acting President says 13 soldiers were killed in Donetsk ; a 14th soldier died in Luhansk . Ukraine PM urges emergency U.N. meeting , accuses Russia of trying to derail election . NATO chief says there may be signs Russia is preparing to pull back forces from border area .