Russian investigators believe the Yakovlev Yak-42 aircraft involved in an accident at Yaroslavl was an airframe operated by charter specialist Yak Service.
The Interstate Aviation Committee (MAK) has tentatively identified the trijet as bearing registration RA-42433 - although Flightglobal's fleet data indicates that this is a Yak-42 operated by Tatarstan Airlines.
There is a Yak-42 used by Yak Service which carries the sequential registration RA-42434.
MAK said preliminary information showed the aircraft had come down in the vicinity of the airport. It has started establishing a commission to investigate the crash.
Reports from Russia state that 36 occupants of the aircraft were killed when it came down, about 1nm after take-off, while transporting the local hockey team to Minsk. There are unconfirmed reports of one survivor.