At least 29 people were injured after a grenade exploded at a nightclub in the northeast of Colombia’s El Bagre municipality, in Antioquia, police said on Monday. Six people were injured directly by the explosion and 18 had injuries inflicted by the shattered glass from drinks, the head of Antioquia police, Carlos Sierra, was quoted as saying. The explosion occurred after two men on a motorcycle reportedly threw a grenade inside the club. Authorities suspect the Clan del Golfo paramilitary organization and the Caparrapos armed gang to be behind the attack, Sputnik reported.