Thousands of people in north-west Pakistan on Tuesday blocked a highway with the coffins of four children killed by a suspected drone strike.
The protests in the Mir Ali area of North Waziristan region began earlier on Monday after a family home was hit, local resident Mohamed Jamal Dawar said.
It is not clear who was behind the incident.
Local activist Zahid Wazir said the drone was operated by the Pakistani military.
He said the home was likely mistaken as a hideout used by Islamist militants.
Pakistani intelligence officials said the explosives were fired by a quadcopter operated by the Taliban militants to target a nearby military post, but that it missed the target.
An independent verification was not possible as the region is inaccessible to outsiders.
Activists of a local rights group, the Pashtun Tahafuz Movement, which is against the militarisation of the region by both the military and the Pakistani Taliban, vowed to continue the protest.
“We will continue to demand justice for our kids,” Mr Wazir said.
The Pakistani military and Islamist militants have been fighting each other in the region for more than two decades.
More than 80,000 Pakistanis, an overwhelming majority of civilians, have lost their lives in years of violence
