A man was found unconscious in the compound of a building under construction on Panditiya Road on Wednesday morning and was declared dead in hospital in the evening.

The man — identified as 40-year-old Lakshman Hati — was a resident of Narendrapur. He worked as a guard in one of the buildings in the neighbourhood where he was found unconscious, police said.

Hati was found in an unconscious state in the compound of 29A Panditiya Road around 9am, the police said. From there he was taken to SSKM Hospital, where he was declared dead.

The Panditiya Road locality — close to Dover Terrace — has a mix of highrise apartment blocks and standalone buildings and slums. Most of the highrise compounds and standalone buildings have security guards.

The police said after a preliminary investigation that there were no external injury marks on Hati. The body has been sent for post-mortem.

“We are suspecting the death was caused by heart failure. The exact cause of death could be known after the post-mortem report comes,” said an officer of Rabindra Sarobar police station, where an unnatural death case has been registered. “No suicide note was found on him.”