The attack followed another attack by fighters on Thursday, which killed two members of another anti-Taliban committee in Swat, in the North West Frontier Province.

The assailants struck as members of the committee slept in Swat's Sertelegram area, Mohammad Ibrar Khan, the mayor, said.

Security guards were reported to have battled with the fighters and killed several of them, although no bodies were recovered.

Local residents formed the group last week to protect the area from Taliban fighters who were rooted out by an army offensive last month.