A Russian Air Force Su-27 Flanker fighter disappeared off the radar screens in Khabarovsk Territory, a source in the Far East Military District said Thursday.
The Defense Ministry press and information service said the fighter had been performing a scheduled flight and was about 30 km away from the airbase it had taken off from.
A search and rescue operation is in progress but so far there have been no signs of the missing fighter.
"The fighter was being piloted by an experienced, well-trained officer," the ministry said.
The Su-27 is an air-superiority long-range, Mach-2 class interceptor-fighter, in service since 1984.
Last year there were at least two fatal crashes involving an Su-27.
On August 30, 2009, a Belarusian Air Force Su-27 fighter crashed while performing aerobatic maneuvers, killing two pilots.
KHABAROVSK, January 14 (RIA Novosti)