A man has been stabbed outside the Home Office building in central London.
The victim's injuries are believed to be life-threatening, the Metropolitan Police has said.
Police were called to the building in Marsham Street, near the Houses of Parliament in Westminster, shortly after 1pm today. A man has been arrested by the Metropolitan Police on suspicion of causing grievous bodily harm.
The injured man sought assistance from staff inside the Home Office building, which is now in lockdown.
In a statement, the Metropolitan Police said: "Police were called at 13:06hrs on Thursday 15 August to Marsham Street, SW1 following a report of a man with a knife at the location.
“Officers attended to find one man with knife injuries. London ambulance service attended the address, where they are with the injured party. The injuries are currently being treated as life-threatening.
“One man (no further details) has been arrested on suspicion of grievous bodily harm and taken to a police station.
“Enquiries are ongoing into the exact circumstances of the incident.”
