A bus crashed into a ravine in Russia, killing 13 workers and injuring 20 others. A criminal investigation has been opened.

The accident happened at around 3:20 in the morning, when the bus carrying workers from the Denisovski mine ran off the road and overturned into a 25-meter deep ravine. The authorities have launched an investigation to check the technical condition of the vehicle and the driver's compliance with traffic rules. As a mark of mourning, Tuesday was declared a day of remembrance in the region. Road accidents in industrial zones are frequent in Russia, especially in remote regions.