One person has died and several police officers have been overcome with suspected carbon monoxide poisoning after a gas leak in a Sydney restaurant.

Emergency services were called after reports of the gas leak at the Haveli Indian restaurant on Garfield Road, Riverstone at about 9.15am on Tuesday.

Police confirmed, a 25-year-old man is dead, and one member of the public and five police officers were conveyed to hospital in a stable condition.

Fire and Rescue NSW Superintendent Adam Dewberry said multiple people inside the restaurant “had been overcome by gas”.

“A number of these people appear to have been affected by carbon monoxide poisoning.”

Not long after the fire teams arrived they had to begin emergency resuscitation on one of the people affected by the gas.

“A person had been

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