Police are investigating following the death of a man in Cranbourne overnight.
Local police were patrolling on High Street when they came across a man walking in traffic about 11.40pm.
Officers requested the man get off the road for his own safety, but he continued to walk on the road and became aggressive towards police.
Police then attempted to arrest the man, but he appeared to suffer from a medical condition.
Officers commenced CPR before paramedics and fire authorities arrived to assist.
Despite the efforts of emergency services personnel, the 32-year-old man died at the scene.
Detectives from the Homicide Squad will investigate the death, with oversight from Professional Standards Command.
This is standard protocol when a person has died in police custody.