Three Christian militants were executed by firing squad on Friday for allegedly leading attacks on Muslims six years ago that left at least 70 dead, sparking fresh sectarian clashes in central and eastern Indonesia, officials said. Mobs torched cars and police posts in restive Sulawesi province before security forces restored order, said Maj. Rudy Sufahriyadi. Elsewhere they burned a prison, freeing scores of inmates, blockaded roads and looted Muslim-owned shops, injuring at least four people. The Roman Catholic men were taken from their tightly guarded prison and executed at 1:45 a.m. local time on the southern outskirts of Palu, said I Wayan Pasek Suartha, a spokesman for the attorney general. They were killed simultaneously by three 12-member firing squads, he said.