A man was held against his will and punched during an underpass robbery described by police as an “appalling incident”.

The robbery occurred in Stevenage High Street at around 1.20am on Tuesday when the victim and his friend were sitting on the steps of an underpass next to The Thomas Alleyne Academy.

The man was approached from behind by another man and led into an underpass – where two other offenders waited.

After restraining the victim, going through his pockets and taking his phone, the trio punched him before he was able to run away.

The three men are all described as white – one tall, one short and chubby, and one of medium build. One of the men had a bike.

Detective Constable Neil Davies, who is investigating the incident, said: “This was an appalling incident which was frightening for both of the victims, both for the male who was robbed and punched, and for his friend - who had to watch it happen as they restrained him.

“We are determined to catch this group and bring them to justice. I am appealing to anyone who may recognise them from their descriptions or saw 3 males in or near the location at the time.

“I would also urge people to take care when out and about. Do no walk in remote areas late at night or in unlit areas. Where possible, take a taxi or drive.”

Anyone with information is asked to contact police on 101 or Crimestoppers anonymously on 0800 555 111.