Acting on a tip off, a DRI team raided a coal laden truck on NH 28 near Chandani Chowk area under Brahmapura police station and receovered the ganja hidden amid heap of coal, DRI Inspector Rakesh Ranjan said.
Two persons have been arrested with the contraband, he said.
Ranjan said the coal laden truck in which the ganja was hidden was coming from Guwahati and heading for Delhi when it was stopped in Muzaffarpur.
With the announcement of total prohibition in Bihar since last week, security agencies have been extra-alert against such smuggling.