“The vessel was on a voyage to fly over navigation radio surveillance systems in the Khabarovsk Territory.

The operator is CJSC Flight Checks and Systems.

The aircraft did not return to the Khabarovsk airport at the scheduled landing time at 19:10, ”Valentina Glazova, a representative of the Far Eastern Transport Prosecutor's Office, told Interfax.

The Khabarovsk Transport Prosecutor's Office is checking compliance with flight safety legislation.

Earlier it became known that the Mi-8 helicopter is searching for the missing An-26 near Khabarovsk.