A police officer has escaped with minor injuries after he was stabbed while responding to reports of a disturbance in west London.
Metropolitan Police officers were called to Dovedale Close in Harefield at 2.44am on Sunday.
"Officers attended and could hear a disturbance coming from inside the premises," a statement from Hillingdon Police said.
"A man opened the door, armed with a knife and was threatening officers.
"The man then stabbed one of the male officers in the arm."
Police said a Taser was deployed on the man and he was detained.
"The officer was taken to hospital, where he was assessed and his stab wound was treated," the statement said. "His injuries are not life threatening."
Scotland Yard said a 40-year-old man was arrested for assault on an emergency service worker, GBH and affray.
The man remains in custody.
Detective chief inspector Thomas Bowen from the West Area Basic Command Unit said: "These officers were courageous and extremely lucky that they were able to walk away from this incident with minimal injuries.
"This is an example of the dangers that our officers face, whilst doing their role as police officers.
"We wish the officer a speedy recovery.”
