Lincolnshire Police have launched a man hunt after one of their female police officers was assaulted.
Ryan Sturman, 29, is wanted by police, accused of assaulting an officer and possessing a controlled drug.
He is believed to have connections to the Scunthorpe, Gainsborough and Lincoln areas.
At around 5pm on Sunday, January 27 police received reports of three men who were seen to chase another man on Trinity Street in Gainsborough.
Police later stopped a silver BMW in Blyton at around 8pm in connection with the incident.
A 37-year-old man, from Scunthorpe, was arrested in connection with drug offences and has since been released under investigation.
There were two other men who were in the car at the same time but they ran from the vehicle and assaulted a female officer.
A third man, who is believed to have been in the car at the same time, is described as white with a medium build and short dark hair.
Anyone who recognises the man pictured above or has information about the incident is being urged to contact police on 101, quoting incident 289 of January 27.