Two men have been arrested in connection with a "disturbance" in the Avenue, Seaham which left them both requiring medical treatment.
The men are aged 18 and 19. Police are now appealing for help with their investigation.
Police were called at 3.25pm, and alerted the ambulance service who then attended the scene. Parts of the Avenue have been closed while officers from Durham Constabulary have been carrying out enquiries. The police said they expected the road to fully reopen later on Saturday evening.