A Russian Tu-95MS bomber crashed during a training flight in the Amur region on Tuesday, killing six crew members and injuring another, according to Russia’s Defence Ministry. The aircraft came down in an uninhabited area, more than 3,000 miles from Ukraine; the crash matters because the Tu-95MS is part of Russia’s strategic nuclear force and has also been used to launch missiles at Ukraine.

The bomber belonged to the Ukrainka air group and was seen engulfed in flames. The Soviet-era aircraft first flew about 70 years ago and is the only propeller-powered strategic bomber in service worldwide, the article says. A Telegram channel claimed three of its four engines failed soon after take-off, while early suggestions of Ukrainian sabotage remained unconfirmed.