An argument over what was believed to be a stolen bike in Kettering saw a man punched in the face.
The victim was in Silver Street between 2.45pm and 3.30pm on Friday (June 28) when he saw people riding on a bicycle which he thought was stolen.
He challenged the rider and called the police.
The rider and his two associates then assaulted him, leaving him with a suspected broken nose.
Three people were arrested on suspicion of causing actual bodily harm.
They were a 27-year-old Kettering man, a 47-year-old Kettering man and a 46-year-old Corby woman.
They have all been released with no further action.