Islamabad, Pakistan (CNN) -- A blast Monday in the outskirts of Peshawar, Pakistan, killed a suspected militant leader and two others, police said.
Another seven people were wounded critically, police said.
The explosion took place outside the home of Haji Akhundzada, suspected leader of Ansar ul-Islam, a militant group operating in northwest Pakistan, police official Tahir Ayub said.
Akhundzada was killed, Ayub said.
The attack could be a result of militant infighting, and it could be the work of Lashkar e-Islam, a rival militant group, Ayub said.
The explosion was caused by a suicide bomb made of five kilograms of explosives, said Hukkum Khan, leader of the bomb disposal squad.