MiG-31 aircraft crashed in the Nizhny Novgorod region, Russia

"On September 19, at about 03.30 p.m. Moscow time [12:30 GMT], a MiG-31 fighter jet of the Aviation Staff Training Center crashed during a planned training flight at one of the military airfields in the Nizhny Novgorod region; both pilots successfully ejected," the Russian Defense Ministry said in a statement.

Preliminary data indicate that a technical flaw had caused the MiG-31 fighter jet's crash, the Russian Defense Ministry said.

http://www.nn.aif.ru/incidents/emergency/v_nizhegorodskoy_oblasti_upal_istrebitel_mig-31