A roadside bomb has killed at least nine Pakistani soldiers and wounded several others in a volatile tribal region near the Afghan border.
A bomb reportedly exploded as a military convoy went through the village of Gulamkhan in northern Waziristan on May 8.
No one immediately claimed responsibility for the blast, but the area is a stronghold of the Pakistani Taliban.
Military officials said a search operation was launched in the area after the attack, which comes two weeks after the Taliban ended a cease-fire with the government.
The Pakistani Army has been battling Islamist militants in the country's seven tribal districts for more than 10 years.
An estimated 6,800 people have been killed in the violence since 2007.
Elsewhere in Pakistan, police have been questioning an agent from the U.S. Federal Bureau of Investigations (FBI) after he was arrested at Karachi's airport for carrying ammunition while trying to board a civilian flight.
The U.S. State Department has confirmed the arrest of an FBI employee, saying he was "on temporary duty" to provide assistance at the U.S. Embassy in Pakistan.
U.S. officials say he was taking part in an anticorruption program.
Pakistani police said on May 7 that they had not received any written evidence proving that the man worked for the U.S. Embassy in Pakistan.
They say he arrived in Karachi on May 1 and was detained on May 5 as he was about to board a flight for Islamabad.
State Department spokeswoman Jen Psaki says Washington is coordinating with Pakistani authorities to resolve the matter.
Based on reporting by Reuters, AFP, and AP