At Aviastar plant in Ulyanovsk, Russia, an Il-76 exploded during tests, 1 person was killed, and there are injured, - Russian media

During the tests, a military transport plane exploded.
This is reported by Censor.NET with reference to Astra.
"A military transport plane exploded during tests at the Aviastar plant in Ulyanovsk. 1 person was killed, 6 were injured," the report said.
"Interfax" reports that emergency services are working at the scene.
RIA Novosti notes that the Il-76 aircraft fuselage was destroyed during the incident.