A murder probe has been launched after two men died following a quadruple stabbing in London, with a third man fighting for his life.

Officers were called at around 1pm today to reports that multiple people had been assaulted outside a business in Long Lane, Southwark, south London.

Metropolitan Police and the London Ambulance Service treated four people for stab wounds at the scene, where they pronounced a 58-year-old man dead.

Three other men were taken to hospital where a 27-year-old man has since died, and a man in his 30s, who has been detained in connection with the incident, is in a critical condition.

The third man, also in his 30s, has suffered injuries not believed to be life-threatening or life-changing.