A Russian Mi-8 military helicopter has crashed in the war-ravaged Chechnya region, with some reports saying six people on board were killed.
Russian helicopters often crash because of technical problems
The crash happened 20km (13 miles) from the main Russian military base at Khankala, near Grozny.
It is not clear whether the crash was caused by technical difficulties or rebel activity.
Chechen separatists have been battling Russian forces in the region for more than five years.
Nine passengers and three crew were said to be on board the aircraft.
But sources differed on casualty figures, with some officials saying no one had died.
Helicopter crashes are common in Chechnya, with a number lost to rebel ground fire, but others coming down because of pilot error or technical malfunctions.
The last incident happened on 11 March, when a helicopter hit power lines, killing 11 soldiers.
Bullet holes were later reportedly found in the tail.
The crash came just three days after the death of Chechen rebel leader Aslan Maskhadov.