Indian officials said that protesters threw stones and set fire to several places around an Indian forces camp in the northeast of the country, and that a civilian was killed in renewed violence, a day after 14 people were mistakenly shot dead by security forces.

At least 14 civilians and a member of the security forces were killed in Nagaland state on Saturday when security forces shot a group of workers after they mistakenly believed they were "militants".

The soldiers killed 6 workers who were returning to their homes yesterday afternoon in the Mon district, near the Burmese border, after they ambushed the rebels suspected of being active in the area.

Later, their families and villagers went to search for the missing, and confronted the soldiers after they found the bodies.

India's Home Minister Amit Shah said he was "extremely pained" by the news that civilians were killed in a shooting incident late last night.

Nagaland state government chief Nehhiyo Ryo also told Reuters that an investigation will be conducted and those responsible for the incident, which he attributed to an intelligence failure, will be investigated and punished.

The Indian army said in a statement that one of its soldiers was killed during the confrontation, while an unspecified number of soldiers were wounded.

Investigation

He added that the soldiers acted on the basis of "credible intelligence" that "rebels" operating in the area had set up an ambush to block their path.

"The cause of the unfortunate loss of life is being investigated at the highest level, and appropriate action will be taken in accordance with the law," the statement said.

Civilians staged protests against the government on Sunday in the Mon district of Nagaland, where the incident occurred.

Locals in Nagaland have often accused Indian forces of mistakenly targeting them during operations against "rebel" groups in the area.

The region includes dozens of tribal groups and small armed gangs whose demands range from obtaining more sovereignty to secession from India.

While the rebellion has subsided over the years due to the conclusion of agreements with several groups with New Delhi that give it more powers, the Indian army still maintains a large barracks in the area.