SYLHET: Licenses of three contractors of the Roads and Highways Department (RHD) have been cancelled on charge of assaulting an engineer of the department. Chief Engineer of Roads and Highways Department Ibne Alam Hasan has ordered to cancel the licenses of the three contractors. All the pending works of the three contractors were also cancelled following the incident, said Manirul Islam, executive engineer of Sylhet division of RHD. The contractors are Akbar Hossain, Mozammel Hossain Nantu and Abdur Rahim. On Wednesday, the three contractors assaulted Abul Barakat Md Khurshid Alam, sub-divisional engineer, at Chowhatta RHD office as he protested them from using low standard bricks in repairing works of a road. Abul Barakat Md Khurshid Alam filed a case against the three contractors with Kotwali police station in this connection on Wednesday night. Later, police arrested one for his alleged involvement in the incident.