Four people in balaclavas threatened a cyclist with a knife and stole his bike from a Swindon park, police said.

The suspects on two mopeds approached a man in his 20s near Rodbourne Road between 7.30pm and 7.45pm on Wednesday night.

They shouted ‘get the bike’ and waved a large knife as they approached the victim, according to detectives.

The cyclist tried to get away on his electric bike but hit a parked car and left it behind, fleeing to the nearby hotel.

It is believed the suspects stopped to pick up the electric bike.

They are described as all wearing balaclavas and dark clothing, with one dressed in blue.

Inspector Annabel Martin said: “This was a very concerning attack and we know the impact this sort of crime has on our communities.

"You may see an increased police presence in the area as we carry out searches and investigate the incident.

“We are asking anyone who saw suspicious activity in the Rodbourne Road area at the time of the incident to contact us as a matter of urgency.

“Even a small observation could provide a vital clue to help identify those responsible.”

Anyone who can help with the investigation should call 101 quoting reference number 54230025164.