Multiple police cars and an ambulance were called to the scene of an incident in Blackburn.
At 6pm on Monday, officers and paramedics were called to Addison Street off Preston New Road following a report of an assault.
Police said a man in his 40s had been assaulted and was taken to hospital for treatment.
The top of Addison Street was blocked off causing queues of traffic along Preston New Road as drivers attempted to pick up children from the mosque nearby.
Describing the scene of the incident, a witness who has been at the scene for almost an hour said: “There was a bit of commotion and the police arrived soon after. It appears to be a serious assault and a section of the street has been blocked off.
"A man walked to the ambulance with his head bandaged up. It looks like a serious assault.
“Three police cars, a police van and an ambulance are currently at the scene. There’s traffic building as people are picking their kids up from the mosque.”
Traffic update website INRIX showed slow moving traffic on Preston New Road at the top of Addison Street.
A spokesperson for police said: "We were called at 6.03pm yesterday (November 20) to Addison Street, Blackburn, to a report of assault.
"Our officers attended and found that a man in his 40s had been assaulted. He was taken to hospital for treatment.
"Anyone who witnessed the incident or has information, please contact 101 – log 1137 of November 20."
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