A suicide bomber has killed at least 22 people and injured Pakistan's interior minister at a rally in North West Frontier Province, police say.
The bombing occurred at a rally in North West Frontier Province.
Interior Minister Aftab Khan Sherpao had finished giving a speech at the meeting in Charsadda when the blast occurred, a police official said.
Mr Sherpao was taken to hospital in nearby Peshawar with minor injuries, official Mohammed Khan told AP.
The province lies on Pakistan's troubled border with Afghanistan.
A son of the minister as well as elected politicians and security officials are among the injured, Mr Khan added.
Bacha Gul Wazir, the province's home secretary, told Reuters news agency he had seen blood on the minister's face but he did not know whose it was.
According to an unnamed intelligence official quoted by AP, security guards blocked the attacker as he tried to get close to the minister.
The attacker detonated the bomb moments later, the source said.
Pakistan's President Gen Pervez Musharraf is due to have talks in Turkey on Monday about security along the Afghan border with his Afghan counterpart, Hamid Karzai.
Gen Musharraf narrowly escaped injury in two bombings which claimed 17 lives in Rawalpindi in December 2003.
In July 2004, Prime Minister Shaukat Aziz survived a suicide bombing as he campaigned for a by-election west of the capital, Islamabad. Eight people were killed.