A man armed with a large knife has been arrested in central Sydney after allegedly stabbing a woman this afternoon, sparking a major police operation.

One woman was injured in the incident and has been taken to St Vincent's hospital in a stable condition.

Police and NSW Ambulance paramedics found the woman inside the Hotel CBD, on the corner of King and Clarence streets, with a stab wound.

Video taken at the scene shows passers‑by using chairs, a crow bar and a milk crate to apprehend the offender, before he was arrested by authorities.

One witness told the ABC he was walking towards Wynyard Park when a man came running around the corner "with a long knife".

A video shows the man jumping onto a car roof in the middle of the street before being restrained by members of the public with milk crates and chairs.

Source: ABC

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