Officials in Pakistan say rescue workers found six more bodies on Saturday in the rubble left by a car bombing in the northwestern city of Peshawar, raising the death toll to 27.
Authorities say the victims of Friday's blast, near a Shi'ite mosque and a crowded market, include children. Some bodies were burned beyond recognition.
Nearly 100 other people were wounded. Doctors warn the death toll could rise.
The head of the North West Frontier Province government (, Haider Khan Hoti,) says officials are still trying to determine who was responsible. He also says "external forces" could be to blame -- a phrase generally understood as a reference to India.
Tensions between the two countries have been rising since India blamed Pakistan for last week's terrorist attacks in Mumbai.
Meanwhile, Pakistani security officials say a suspected U.S. drone (unmanned aircraft) has carried out an airstrike in Pakistan's northwest tribal region, killing at least three people.
Local officials and witnesses said the drone fired at least one missile at a home in the town of Mir Ali in North Waziristan Friday.
Pakistan's government has accused the United States of carrying out missile strikes in the past, which the U.S. has neither confirmed nor denied. Pakistani leaders have criticized the attacks as violations of Pakistan's sovereignty.