New Delhi, Jan. 24 -- A suicide bomber detonated an explosive vest among guests at a wedding ceremony in northwest Pakistan on Friday, killing at least seven people and wounding 25 others, police said.

The attack took place at the home of Noor Alam Mehsud, a pro-government community leader in Dera Ismail Khan, a district in Khyber Pakhtunkhwa province, said local police chief Adnan Khan. He said officers transported the dead and injured to a hospital, where some of the wounded were listed in critical condition.

Witnesses said guests, were attending the ceremony, with some dancing to the beat of drums, when the bomber struck.

No group immediately claimed responsibility for the attack. However, suspicion is likely to fall on the Pakistan...