Over 200 people blocked a road in New Plot area and held demonstrations against the unscheduled power cuts in the city.
Led by Jammu West Assembly Association president Sunil Dimple, they raised anti-government and anti-power department slogans and demanded smooth electricity supply.
"We will launch major agitation in Jammu city against the government, which has failed to eradicate the menace of power theft," Dimple told reporters here.
Earlier, over 300 people, including women, from various colonies, blocked the Satwari Chowk on the highway to protest the power failure in the area during the night.
The protestors, who raised anti-government slogans, even clashed with police.
After a one-and-a-half hour blockade, traffic was restored on the highway.
People also held protests in Bohri Patta and Hazuri Bagh areas over the power cuts through out the night.