Anti-Terrorism Court (ATC) in Karachi on Saturday sentenced a convict worker of banned outfit to 21 years in prison in possession of explosive material and illegal weapons case. The court also directed him to submit Rs 75,000 as well. The convict identified as Asif had contacts with outlawed organisation Lashkar-e-Jhangvi and he was arrested by Khawaja Ajmir Nagri police on August 18 for possessing explosive material and illegal weapons.