A woman was allegedly sexually assaulted on a bus in Boston after becoming unwell during the journey.
The incident happened on a IT2 Brylaine bus, which was heading towards the Carlton Road area of Boston at 3.28pm on December 5.
Lincolnshire Police has released a CCTV image in connection with the sexual assault. The force believes the pictured man may be able to help with the investigation.
The man has been described as around five foot six inches and clean shaven with dark hair. He was wearing a dark coat.
Anyone with information should contact police on 101 or via email at [email protected] quoting incident 269 of December 5.
It can also be reported anonymously through Crimestoppers on 0800 555 111 or by clicking here.