A 17-year-old cyclist was knocked unconscious after he was hit from behind by an unknown vehicle on the A151 High Road at Weston.
Police say the teenager was taken to Boston’s Pilgrim Hospital for a check-up on what were suspected to be minor injuries.
The accident happened shortly before 4.30pm on Tuesday, close to Baytree Nurseries Garden Centre.
Witnesses can contact police by dialling 101.