A week after a 24-year-old labourer working on a Mumbai Metro line was electrocuted in Maharashtra's Thane district, an FIR has been registered against a supervisor and a crane operator of the project site, the police said on Tuesday.

A case under section 304(a) (causing death by negligence) of the Indian Penal Code has been registered against site supervisor Pravin Giripunje (30) and crane operator Laljit Singh (25), the station house officer of Narpoli police station said.