Unknown militants attacked a house in the Khyber tribal region in northwest Pakistan killing at least five people and injuring two others

Unknown militants have attacked a house in the Khyber tribal region in northwest Pakistan and killed at least five people and injured two others, security officials say.

Militants hurled hand grenades into a guest house (Hujra) of local tribesman Fazal Muhammad in Tabi Shan Khel village in Landikotal Tehsil of Khyber Agency late on Saturday, killing five people and injuring two others, Pakistani officials told Press TV on Sunday.

The injured people were transferred to a local hospital as security forces cordoned off the area and started search operations to arrest the militants. No group or individuals claimed responsibility of the attack.

Meanwhile, Pakistani security forces on Saturday killed at least 9 militants in two different incidents in Swat valley in the northwestern Khyber Pakhtunkhwa province.

In another incident, Pakistani troops clashed with militants and killed at least four militants in the Madayan area of Swat.

Security Forces have also arrested a would-be bomber in a separate incident in Swat district.