Pakistani authorities say at least six paramilitary soldiers were killed and more than 10 others wounded when a suicide car bomber attacked a military check point in the restive tribal area bordering Afghanistan.
Earlier, an intelligence official said seven soldiers were killed.
The officials say the attack occurred Monday, near Miran Shah, the main town of the semi-autonomous North Waziristan region. Security forces cordoned off the area and evacuated the wounded troops to a military hospital.
On Sunday, pro-Taleban militants in North Waziristan offered a month-long cease-fire to give time for tribal elders to broker a settlement to end the bloodshed in the region.
The rebels also gave a number of demands, including the withdrawal of army troops from new checkpoints and replacing them with tribal police and the release of tribesmen detained during military operations.
Pakistan is a key U.S. ally in the war against terrorism. Taleban and al-Qaida militants have been using the rugged border dividing Afghanistan and Pakistan as their hideout. It is believed that al-Qaida leader Osama bin Laden also is hiding in the region.
Some information for this report was provided by AFP, AP and Reuters.