An Antonov An-24 passenger plane carrying around 50 people crashed in Russia’s Far East on Thursday, with all on board feared dead, according to Reuters.

The aircraft, operated by Siberia-based airline Angara, was flying from Blagoveshchensk to Tynda when it disappeared from radar near its destination. Its burning wreckage was later spotted by a helicopter in a forested area roughly 15 km from Tynda in the Amur region.

Preliminary reports said there were 43 passengers—including five children—and six crew members. The aircraft, built in 1976, was nearing 50 years old.

Emergency services confirmed debris had been located and that rescue teams were en route. Authorities have launched an investigation into the crash, Reuters reported.