A case has been registered against four people, including a Sub-Divisional Magistrate (SDM), for allegedly thrashing a tehsil official to death, police said on Sunday.

The FIR was registered on Saturday night at Lalganj police station against Lalganj SDM Gyanendra Vikram Singh and three others under relevant sections of the Indian Penal Code (IPC), including 302 (murder), Superintendent of Police Satpal Antil said.