Islamabad, Pakistan (CNN) -- A roadside bomb struck an army convoy in northwest Pakistan, killing 14 soldiers and wounding 25 others Sunday, officials said.
No group immediately claimed responsibility for the attack in North Waziristan, one of seven districts in Pakistan's volatile tribal region bordering Afghanistan.
Security analysts have described the region as a haven for various factions of Afghan and Pakistani Taliban and al Qaeda militants, and it has been targeted frequently by suspected U.S. drones for years.
Militant groups have retaliated by attacking government forces.
Journalist Zahir Sherazi contributed to this report.