Man dies after alleged assault following card game in Sydney cafe

A man has died after allegedly being assaulted following a card game at a Sydney coffee shop.

Authorities were called shortly before 2.30pm to South Street in Granville after receiving reports a man in his 60s had suffered a heart attack.

When police arrived they quickly set up a crime scene and said they are treating the death as suspicious.

The riot squad was initially called in to control crowds around the crime scene.

The man allegedly died following a heated argument with a fellow player while gambling inside a coffee shop on the street.

Paramedics tried to revive the man but were unable.

Forensic officers are currently combing the scene for evidence.

Police took a number of men who were inside the coffee shop to Granville Police Station for questioning.