Police Officers are currently on scene at a stabbing on Carburton Street in Westminster.
This is the third serious stabbing within the capital within a number of hours.
Police have put up a cordon and a crime scene in place at this time,
UPDATE: A cordon has now been lifted after police were called to Carburton St at 9.07pm tonight.
Paramedics from the London ambulance service treated a man in his 30s, who is believed to have been stabbed.
He is in hospital and his condition is not believed to be life threatening.
No arrests have been made