A man who died in Sydney’s CBD after police stunned him with a Taser might not have been involved in a robbery, police say.

Officers had identified the man as a suspect after a report of a robbery in The Rocks about 5.30am (AEDT) today.

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They confronted him a short time later in Pitt Street and tried to arrest him, but say he resisted, so capsicum spray and a Taser were used to subdue him.

He stopped breathing and could not be revived despite the efforts of police and paramedics.