Police in York are investigating a serious assault which occurred on Acomb Road, Acomb, on the corner of Fairfax Court, at about 7.40pm on Monday 21 January 2013.
As a result of the incident, a 50-year-old local man suffered a head injury and was taken by ambulance to York District Hospital.
A 19-year-old man and a 16-year-old boy have been arrested in connection with the investigation. They remain in police custody for questioning.
Witnesses or anyone with information that could assist the investigation are asked to contact North Yorkshire Police on 101, select option 2, and ask for York CID.
Alternatively, information can be passed on anonymously to Crimestoppers on 0800 555111.