NEW : Russian attacks damage hospital , killing one man . Ukraine : 10 pro - Russia militants dead in fighting . Separatist official puts number at 10 , says they attacked government aircraft . CNN ca n't independently confirm the number .
NEW : Rocket attacks damage hospital , kill one man . Ukraine claims 300 pro-Russia militants dead in fighting . Separatist official puts number at 10 , says fighters downed government aircraft . CNN ca n't independently confirm the accounts .