Fatal helicopter crash grounds Russian helicopter - PHOTO - VIDEO

Baku. 3 August. REPORT.AZ/ The Russian defence ministry has grounded its fleet of Mi-28 attack helicopters after a fatal accident at an air show on Sunday, Report informs citing Russian media.

One pilot died and another jumped clear as the helicopter crashed during an aerobatic display by the elite Berkut squadron in the Ryazan region, about 170km (105 miles) south-east of Moscow.

The Russian military has blamed the crash on a hydraulics failure.

There have been six other Russian air force crashes in recent weeks. The two-seat gunship was performing stunts and firing flares with three other helicopters. It then began to spin rapidly, before falling to the ground and bursting into flames.

Its pilot Lt Col Igor Butenko was killed. His son told Russian media that the accident was not due to pilot error. "There are situations when it's impossible to survive no matter how well-trained the pilot is," he told Lifenews.

The Russian defence ministry says the condition of the other pilot's condition is "satisfactory". There were no injuries to spectators at the air show. An investigation has been launched into the cause of the crash, although the surviving pilot has said that a hydraulic failure was the cause. The country's fleet of Mi-28s will remain grounded until the investigation is completed.