KHAR, Pakistan — A mortar struck a home and killed two children and their mother in a northwestern Pakistani region where security forces are carrying out a “targeted operation ” against the Pakistani Taliban, residents and a hospital official said Wednesday.

It was not immediately clear who was responsible for the overnight civilian casualties in Mamund, a town in the Bajaur district of Khyber Pakhtunkhwa province bordering Afghanistan.

Naseeb Gul, a medical doctor at a local hospital, said the dead were two children and their mother. Two people were also wounded Tuesday when another mortar hit their home, he said.

Angered by the deaths, hundreds of demonstrators were refusing to bury the bodies and demanding an investigation, according to local villager Mohammad Khalid.

There was no immediate comment from the government or the military.

The latest development came days after security forces launched an offensive in Bajaur to target militant hideouts. The provincial government said the “targeted operation” was launched after tribal elders failed to evict insurgents from the region.

Government officials said the ongoing offensive against the Pakistani Taliban has displaced 25,000 families or an estimated 100,000 people in Bajaur, where authorities eased a curfew on Wednesday, allowing residents to buy essential items.

Thousands of displaced people are currently residing in government buildings, and many other have gone to other safer areas to live with relatives.

The Bajaur offensive is the second operation there since 2009, when the military launched a large-scale campaign against the Pakistani Taliban, also known as Tehreek-e-Taliban Pakistan, or TTP. The TTP is a separate but a close ally of the Afghan Taliban, who seized power in Afghanistan in August 2021.

Many TTP leaders and fighters have found sanctuary in Afghanistan since the Taliban takeover and have been living there openly. Some have crossed the border back into Bajaur to carry out attacks.

Associated Press writers Riaz Khan and Rasool Dawar contributed to this story from Peshawar, Pakistan.