Pakistani security officials say a suicide bomber has killed at least 40 people and wounded many others at a tribal meeting in northwestern Pakistan.
Sunday's attack took place at a traditional council, or jirga, in the tribal region of Darra Adam Khel in North West Frontier Province.
Elders from five local tribes had called the outdoor meeting to discuss security in the area. A government official says the elders were finalizing an agreement to fight against Islamic militants.
There has been no claim of responsibility.
President Pervez Musharraf condemned the attack, which was the third suicide bombing in three days in northwestern Pakistan.
On Friday, a suicide bomber killed more than 40 people at the funeral of a slain police officer in Mingora, in the Swat Valley.
In an interview broadcast Sunday on a private Pakistani television network, the country's caretaker interior minister, Hamid Nawaz, blamed the growing militancy and suicide attacks on outside countries such as India, the United States, and Afghanistan.
The US Embassy described his claims as untrue.