A bomber exploded his device stripped on his body in the officeof Lashkar-e-Islam group in Khyber tribal agency of northwest Pakistan, officials said.
The attacker struck members of the group when they were entering mosque in the base, they said. Five people were killed and five others were injured, a leader of the group Qari Minhaj said.
Minhaj said that three children and a passerby were among those killed in the attack.
In another bomb attack two people were killed and two others were injured in a roadside bomb blast in nearby Bajaur tribal region. A vehicle was hit by the bomb at Charmang area, an official said.
In the southwestern city of Quetta, unidentified gunmen shot dead two police of an investigative agency on Friday, police said.
The members of Crimes Investigation Department came under attack when they were coming from night duty. No group claimed responsibility for the attack.