Four men have been stabbed in a series of unprovoked attacks in less than a week in west London.

Detectives released a CCTV still of the suspected knifeman on Tuesday, after the victims were left with “significant injuries”.

In the first attack, a 42-year-old man was left with knife injuries to his ear when he was attacked in Glencoe Road, Hayes, at about 9.30am on Wednesday July 3.

The suspect was a muscular black man, about 35 years old with straight dark hair and wearing dark clothes.

Four days later on July 7, another man, aged 41, was attacked by a man wearing a hoodie and white gloves at about 10am near a bus stop also in Glencoe Road, Hayes, causing him multiple cuts to his face and neck.

We are very concerned about these attacks, which have left four men with significant injuries. It is clear we need to catch the man responsible as soon as possible. I would urge anyone who recognises the man pictured to contact police immediately

Later, at 10pm on the same day in Friar Road, Hayes, a man wearing a hoodie, white T-shirt and dark trousers slashed a 57-year-old in the face with a knife.

The following day at about 3.10am, a 47-year-old man was attacked in Yeading Lane, Hayes, by a suspect wearing black clothing and a puffer jacket, causing injury to the victim’s eye.

Detective Chief Inspector Garth Hall said: “We are very concerned about these attacks, which have left four men with significant injuries.

“It is clear we need to catch the man responsible as soon as possible. I would urge anyone who recognises the man pictured to contact police immediately.

“I understand there will be concern in the community about these incidents and so we have increased resources and patrols in the Hayes area to provide reassurance.”

Anyone with information or who recognises the suspect can call police on 101, quoting CAD 2585/03Jul, or to remain anonymous contact Crimestoppers on 0800 555 111 or online.