UPDATE 3pm:&nbsp;The death of man&nbsp;during a citizen's arrest in central Victoria will be the subject of an internal police investigation, after it was found that an off-duty officer was involved in restraining the man. Police say the man was behaving erratically, damaging property and trying to get into passing cars, when he was restrained by a group of people on High Street in the town of&nbsp;Heathcote about 9.20pm on Sunday. It is believed the man smashed the glass shopfront of a closed take-away food business to force his way inside shortly before&nbsp;he was confronted by locals. It is understood that an off-duty senior constable driving past&nbsp;the scene was urged to help by a member of the public, and assisted in restraining the man. The man became unresponsive, and the off-duty officer and other locals&nbsp;started CPR. Ambulance paramedics took over once they arrived,&nbsp;but the man died on the footpath outside the take-away. The homicide squad and professional standards command&nbsp;are investigating. A police spokeswoman confirmed an off-duty officer had been involved, but said it was believed the man had already been at least partially restrained and police had been contacted before&nbsp;he intervened. "He assisted in restraining and resuscitation attempts," she said. It is understood the officer works in the region and had been returning from dinner when the incident occurred. Union Hotel owner Lyn Edwards said the pub, which borders the take-away business, had closed about an hour before the incident. Locals who witnessed the incident&nbsp;said they did not know the man. Ms Edwards said she did not think&nbsp;the incident was captured on CCTV, as the hotel and other nearby businesses did not have cameras. It is the second Victorian time in two months in which a member of the public has intervened in an apparent crime and&nbsp;the offender has subsequently died. In December, a burglar in Frankston&nbsp;was killed when his victim screamed, alerting a neighbour. The burglar died in an ensuing struggle and the neighbour&nbsp;remains the subject of a homicide investigation.&nbsp; In Cairns in 2013, a man who had been drinking heavily was restrained by members of the public after he had assaulted a woman. Neville Reading, 37, died after being placed face down on the ground and restrained for eight minutes.Those who restrained him were cleared by a Coroner&nbsp;of any responsibility in the death. Melbourne man Anthony Dunning also died after being restrained by Crown Casino security staff in 2011. Anyone with information about the Heathcote death&nbsp;is asked to contact Crime Stoppers on 1800 333 000. - The Age UPDATE 7.50am:&nbsp;Homicide Squad detectives are investigating the death of a man in Heathcote last night.&nbsp; Police were called to a disturbance in High Street around 9.20pm, where it was reported a man was acting erratically.&nbsp; It is believed the man had damaged property and tried to stop and get into passing vehicles.&nbsp; The man was restrained by people at the scene and a short time later became unresponsive and resuscitation attempts commenced.&nbsp; Paramedics arrived and took over the resuscitation effort, however the man was unable to be revived and died at the scene.&nbsp; The man has been identified, however police are still in the process of notifying his next of kin.&nbsp; Police are appealing for anyone who may have witnessed the incident or the man to contact Crime Stoppers on 1800 333 000.&nbsp; Police will prepare a report for the coroner. EARLIER: A crime scene has been set up in the main street of Heathcote, south-east of Bendigo. Police have blocked the north-bound lane of High Street from Herriot Street. An area between the Union Hotel and a fish and chip shop has been blocked off with police tape. South-bound traffic is unaffected. The road has been blocked since before 4.30am. More to come.