Russian news reports say an Antonov-148 airliner has crashed during a test flight, killing six people including two pilots from Myanmar.
The reports citing officials in the Emergencies Ministry and the Investigative Committee say the crash took place Saturday morning in the Belgorod region about 600 kilometers (350 miles) south of Moscow.
The Interfax-AVN military news agency said the Myanmar air force has ordered two An-148s. It was not immediately known if the plane that crashed was to be delivered to the country.
The An-148 is a regional high-wing jet with a maximum range of about 5,000 kilometers (3,000 miles) and passenger capacity of 99.
There was no information on the cause of the crash. State airline Rossiya last year criticized the An-148 for door lock and engine problems.