Five people were killed and 21 were injured in a bus accident south of Moscow in the early hours of Sunday, Russian authorities said.
Russia's Federal Road Traffic Inspection agency said the accident took place at around 5:45 am local time (0245 GMT) in the Ryazan region.
"As a result of the accident five people died. 21 were injured," the agency said on Telegram, adding that two of the injured were under-age.
It said the injuries were of "various severity."
The agency said the bus could have hit a pillar by a railroad bridge.
The accident took place on a highway near the village of Voslebovo around 270 kilometres (170 miles) south of Moscow, the agency said.
There was a total of 49 passengers onboard, according to authorities.
Police said it had opened a criminal case on violations of traffic rules.