(CNN) -- Two Russian pilots aboard a MiG-31 fighter jet were killed when it crashed Tuesday, state media said.
The plane crashed minutes after take off from a military airport in the Perm region, the state-owned Ria Novosti news agency said.
It was on a routine training flight, the news agency said, citing the defense ministry.
A similar jet crashed in the region last year, but the pilots were able to parachute to safety, the news agency said.
Following the crash, the defense ministry grounded all MiG-31s while it investigated the cause.
The plane was not carrying weapons when it went down, said Itar-Tass, another official news agency.
