Police watchdog probes head injury arrest in Hanwell
The police watchdog is to investigate how a 56-year-old man sustained critical head injuries while he was being arrested in west London.
A police officer received minor stab wounds during the incident in Hanwell.
Two PCs had been called to reports of a man shouting through the night and were attacked after they went into a house in Cowper Road, police said.
An Independent Police Complaints Commission spokesman said Saturday's incident has been referred to them.
The man remains in hospital in a critical condition, police said.
The injured officer has left hospital.
IPCC Commissioner Deborah Glass said: "A man is in a serious condition in hospital after a struggle with police officers, during which an officer was also injured.
"While the police are investigating the injury to their officer, it is right that we examine whether the man's present condition is as a result of his contact with police."