Terrorists on Saturday targeted Homs refinery with mortar shells, causing material damages to the gas pipelines inside the refinery. \"One of the shells fell in the area of a gas collection unit, causing damage to the unit and to the pipelines,\" director of the refinery Akram Sultan told the state-run news agency. He added that the staff of the industrial security unit discharged the collection unit from gas and began maintenance right away. The refinery director said that two other shells fell near the square of gas filing unit and the tankers\' shipping with no casualties among the workers.