Guwahati, Dec. 27: Police today resorted to lathicharge and used rubber bullets and tear gas to disperse anti-dam protesters blocking National Highway 52 in Lakhimpur district of Assam. Lakhimpur superintendent of police David Neitam told The Telegraph that the police were compelled to use force when around 800 anti-dam protesters started hurling stones on civilian vehicles plying at Chauldowa near Gogamukh on the highway.