A man was rushed to hospital with serious head injuries after he was assaulted outside Chalk Farm tube station in the early hours of this morning.
Witnesses described seeing a fight break out between a group of men, which resulted in one of them sustaining a serious head injury.
She said: "There was a big fight, police were there and they sealed off half the road."
A London Ambulance Service spokeswoman said: "We were called at 1.40am to reports of an assault in Haverstock Hill, near Chalk Farm underground station.
"The ambulance arrived in three minutes.
"A man with head injuries was taken to hospital as a priority."
A Met Police spokesman said: Police were called by London Ambulance Service at 1.40am on Wednesday, June 1, to a man collapsed near to Chalk Farm tube station in Camden.
"The man was taken to hospital suffering head injuries. His condition is serious, we await a further update.
"Camden officers attended the scene and an investigation was launched. Enquiries continue to establish the full circumstances."
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