Two pilots died when a Russian warplane crashed in a residential area of the Siberian city of Irkutsk.
"The Su-30 aircraft crashed during a test flight," the civil defense said on Sunday, according to the Interfax news agency.
The machine crashed in a residential area, but according to initial information from the authorities, there are no other victims on the ground.
The fire has now been extinguished and the clean-up work is continuing.
The amount of property damage is still being determined.
In the affected residential area there are mainly small-storey private houses.
The public prosecutor's office has launched investigations into breaches of safety regulations.
The aircraft is a modernized variant of the Su-30, the Su-30SM multi-role fighter, which only had its maiden flight in 2012.
Just a few days ago, a fighter jet crashed into a residential building in southern Russia.
The number of civilian victims there now amounts to 15 dead.