A man was taken to hospital after being assaulted in the street in Loughborough.
The man was injured after an incident in Oxford Street on Friday afternoon.
Police sealed off the street while a forensic investigation unit worked at the scene.
A police spokeswoman said: "We were called out at 3.35pm on Friday to a report of an assault.
"A man was injured and taken to hospital.
"We believe there were three male suspects involved in the incident.
"We believe the incident happened on Oxford Street, between the junction of Paget Street and Leopold Street, in Loughborough.
"We would appeal to anyone who was in the area at about 3.30pm or shortly after to call us if they think they have any information that might help."
The police can be contacted by calling 101.