A new group of Jewish radicals is trying to enforce ultra-Orthodox religious beliefs by painting swastikas on the tombstones of Israel's founders and bombing sex shops and newspaper stands.

Police say the mysterious group of Jewish activists is called the "Keshet" ("Keepers of the Torah") and uses army-issued explosives, either stolen from army bases or supplied to them by military sympathizers.Their campaign, a renewal of the long battle against Israeli secular society by Orthodox fundamentalists, has included the planting of more than a dozen bombs and the tossing of a grenade into a Jerusalem sex shop. No one has been hurt in the attacks, partly because anonymous phone calls often warn in advance that bombs have been planted.