A suspected stabbing and car crash in Sydney’s south has forced police to close roads around Engadine, including the Princes Highway, after reports of multiple injuries, including a police officer.

The Princes Highway between Farnell Avenue and Heathcote Road is closed as police search for the suspected perpetrator.

Transport for NSW advises drivers travelling south from Kirrawee to use the Old Princes Highway, The Grand Parade, Linden Street, River Road, Bangor Bypass, New Illawarra Road, Heathcote Road and back to the highway.

According to the agency, this route is suitable for all vehicles.