A resident says he was struck over the head after he challenged a burglar trying to break in to his home.
Police are appealing for information after the incident, which happened in Brickyard, Great Limber at about 7.15pm on Sunday, October 27.
Police say the resident saw a man run past his window and went out to confront him.
It is believed there were two men who were trying to steal a car transporter. Both escaped.
If you have any information call Lincolnshire Police on 101 and quote incident 371 of October 27.