CODECO is one of a myriad of militias fighting over land and resources in eastern DR Congo.
Despite the slow speeds, the resident expressed satisfaction with the service’s return.
According to the administrators, the proliferation of illegal firearms, competition over natural resources, and political intrigues are among the drivers of the conflicts.
HRW claims the Ethiopian federal forces have committed atrocities in 13 towns with a population of 23 million people, together with a government-affiliated militia.
One of the three was shot dead, a second died of his wounds in hospital while the third was arrested, the statement said.
The NGO called for the suspension of all deployments of Ethiopian federal forces to peacekeeping missions until "commanders responsible for grave abuses are held accountable."
Government officials in Addis Ababa have said on several occasions that the violence in Amhara, the second largest region in Ethiopia, is under control.
The groups are most visible at roundabouts and main street intersections, where their often-masked members install checkpoints, blocking traffic with weapon-mounted armoured vehicles.
CODECO fighters ambushed users of a road near the village of Tali, where they stopped 15 people including one woman on Saturday afternoon.