ISLAMABAD, Pakistan — Peace talks between the Pakistani government and the Taliban were suspended in acrimony on Monday, as a government committee refused to meet with Taliban representatives in the aftermath of the reported killing of 23 paramilitary soldiers in militant captivity.

A faction of the Taliban had claimed responsibility for the killings late Sunday, throwing an already faltering peace process into further uncertainty.

The paramilitary soldiers, belonging to the Frontier Corps, had been held hostage since 2010. A faction of the Taliban insurgents, which wields influence in the northwestern Mohmand tribal region, said that the soldiers had been killed in retaliation for recent killings of Taliban prisoners in government custody in Karachi and Peshawar.

Omar Khalid Khurasani, a spokesman for the Taliban faction in the Mohmand tribal region, warned of more attacks against security forces.