Rocket destroys helicopter near Ukraine rebel city - army
"According to a preliminary assessment, the explosion was the result of fire from a rocket-propelled grenade launcher," it said in a statement. There were no casualties, it said.
A senior security official earlier told a news briefing that the Mi-8 transport helicopter was hit in the fuel tank by a sniper bullet and that the pilot was injured.
A Reuters correspondent saw thick black smoke rising over the airfield and Ukrainian troops were barring access. Local residents said they had heard shooting and three explosions.
(Reporting by Thomas Grove in Kramatorsk, Ukraine and Sergei Karazy, Pavel Polityuk and Alastair Macdonald in Kiev; Writing by Alastair Macdonald; Editing by Sonya Hepinstall)