Around a hundred activists rallied in downtown Beirut on Saturday to protest the killing of prominent Hezbollah critic Lokman Slim and to demand a transparent investigation.
Slim, a Shi'ite publisher in his late fifties, ran a research centre, made documentaries with his wife and led efforts to build an archive on Lebanon's 1975-1990 sectarian civil war.
He was a vocal critic of what he described as armed group Hezbollah's intimidation tactics and attempts to monopolise Lebanese politics.