The gatekeeper of Joypurhat's Puranpoil level crossing failed to lower the gate on time as he was either sleeping or drowsy, causing the accident that left 12 people dead and eight others injured, a railway probe found. Holding gateman Nayon Miah main responsible for the accident, the committee has recommended his removal from the job. Nayon, who was recruited under a railway project, has already been suspended. The committee also blamed the bus driver and the Roads and Highways Department for the accident. The four-member probe committee, led by Nasir Uddin, divisional transport officer (Paksey) of Bangladesh Railway (BR), submitted their report on Saturday night.