The incident took place yesterday afternoon and the deceased was identified as Bankim Chandra Bose.
According to police, Bose, a resident of Santacruz, was mentally-unstable and had a habit of running away from home, which he had done several times in the past.
"Around 3.30 pm on Sunday, Bose came to Santacruz police station complaining that he is scared that someone would kill him. We calmed him down and offered a glass of water," senior inspector Shantanu Pawar said.
He left the place around 4 pm and entered M T Building, a three-storey structure, positioned next to the police station.
"Immediately afterwards, passersby and a few constables standing outside the police station heard a loud thud and found Bose lying a pool of blood. He was rushed to a hospital, but was declared dead on arrival," said police.
A case has been registered in this regard and further investigation is on, police said.
