The men were killed in separate attacks late Sunday and early Monday in South Waziristan, a mountainous region close to Afghanistan where al Qaeda and Taliban militants are known to operate, according to a security official and a military statement.
Gunmen killed three of the men at a market in Wana, the region's main town, while the other five were shot to death in attacks at their homes in a town north of Wana, the official said. He did not give his name because he was not authorized to speak to the media.
The men were scheduled to meet on Monday in Wana to discuss ongoing efforts to negotiate peace between Pakistani forces and the militants, the official said. The government is encouraging moderate tribal elders to broker a cease-fire in the region, but there has been little sign of success.
Meanwhile, a suicide attacker detonated a bomb near a guest house where military officers were staying Monday in a volatile mountain valley in northwestern Pakistan, wounding one person, authorities said.
The bomber, who blew himself up when he was stopped by soldiers at a checkpoint, was killed and one other person was wounded, according to a military official who spoke on condition of anonymity because he was not authorized to speak to the media.
The attack happened in the town of Kabal in the Swat region, a former tourist resort where security forces have been battling loyalists of a pro-Taliban cleric.
The Pakistan-Afghanistan border area has long been considered a likely hiding place for al Qaeda leader Osama bin Laden and his top deputy, Ayman al-Zawahri, and the United States has pressured the government of President Pervez Musharraf to crack down on militants operating in the area.
On Sunday, Pakistan reiterated that it willand Taliban militants on its soil, after a report in The New York Times said the Bush administration was considering expanding U.S. military and intelligence operations into Pakistan's tribal regions.
The Pakistani government also has blamed Baitullah Mehsud, a South Waziristan-based militant leader with links to al Qaeda, in the Dec. 27 assassination of opposition leader Benazir Bhutto. Mehsud has reportedly denied involvement, and many Bhutto backers accuse elements within the government of playing a role in her killing.