Hizbullah signed an accord Monday with some local Sunni factions to defuse sectarian tension. More than 100 people have died in sectarian fighting in Lebanon so far this year. Monday's agreement prohibits any Muslim group from attacking fellow Muslims. It was signed by Hizbullah and some Salafist groups, followers of a radical form of Sunni Islam. Many Salafists - whose name comes from the Arabic word for ancestors - consider Shi'ites as heretics. This year has seen Lebanon's worst sectarian violence since the 1975-90 civil war, with street battles in Beirut, its suburbs, the central mountains and the northern city of Tripoli.