“Due to a braking system failure, a large goods transport vehicle hit three other vehicles at high speed, including two buses,” Goma mayor Timothee Mwissa Kiense told AFP.
“The provisional death toll is 25 people killed at the scene.”
The accident occurred in the early evening on a section of steep road, he said, adding those injured had been taken to hospital.
Faustin Zabayo, a resident who took part in the rescue operation, told AFP that he “saw 26 bodies being taken to the morgue”.
Deadly traffic accidents are common in DR Congo, a vast country the size of continental western Europe, where mostly dirt roads are poorly maintained.
The National Road Safety Commission said there were 1,895 road accidents in North Kivu alone in 2019, in which 261 people were killed.