At least 37 people were killed Tuesday when three buses collided outside the northeast Nigerian city of Maiduguri, the country's road safety agency said.
The accident happened when two commercial buses had a head-on collision and burst into flames, before a third bus then crashed into them, said Utten Boyi, head of the road safety agency for Borno state.
The collision happened near Jakana village, some 35 kilometres (20 miles) outside Maiduguri, the Borno state capital.
The collision occured when the tyre of one of the buses burst and it hit the vehicle coming from the opposite direction, Boyi said, blaming "excessive speeding" for the accident.
Accidents are common on the poorly maintained roads of Nigeria, Africa's most populated country, due largely to speeding and disregard of traffic rules.
Earlier on Tuesday, 17 people were killed and four injured when their bus crashed into a truck near Nigeria's capital Abuja, local media reported, citing a road safety official.
The victims were travelling from northeastern Gombe state, according to the media reports.