At least 14 Pakistani soldiers were killed and more than 25 others injured when a security forces convoy was targeted by a roadside bomb in the country's lawless North Waziristan tribal region.
The incident occurred near Miranshah, the main town of North Waziristan tribal agency, security officials were quoted as saying by TV news channels.
"At least 14 soldiers embraced martyrdom and 25 others were wounded in an IED (attack)," a security official said about the bombing.
All the soldiers killed were in one truck and those injured were in vehicles behind it, the official said.
No further details were immediately available.
Nobody has claimed responsibility for the attack but Taliban militants frequently attack security forces in the area.
The attack came just a day after Tehrik-e-Taliban Pakistan chief Hakimullah Mehsud reportedly directed his militants not to target Pakistani troops in North Waziristan.