One kills in bus attack, wounds several in anglophone, Cameroon
Images shared on social media of the incident appeared to show five coaches with their front windows and roofs smashed in by construction equipment.
Witnesses told local media that the attackers had also used heavy machinery to dig a large trench in the middle of the road, which was undergoing repairs in the village of Akum near the city of Bamenda.
The assailants "forced their way on to the construction site and seized an excavator which they used to dig a hole through the road", said an employee of the roadworks company managing the project.
Years of resentment at perceived discrimination at the hands of Cameroon's majority French speakers have led to almost daily acts of violence and retribution, triggering an army crackdown.
A total of 109 members of the police and security forces have been killed, according to government figures.