The 37-year-old man was found dead near Kalyan creek in February, 2015, following which a case of accidental death was registered at Kopri Police Station, Thane Police spokesperson said.
Three persons were arrested in connection with a crime in Thane recently, who during interrogation revealed details of the case of last year and said that seven people had strangulated the man on February 25 and dumped his body in Kalyan creek, the officer said.
The trio also told police that the victim was employed with one of the seven persons.
The case has been lodged under section 302 (murder), 201 (causing disappearance of evidence) and 34 (common intention) against the seven persons.