Officers investigating reports of an assault in the Highcliffe area of Christchurch are appealing for any witnesses to come forward.
The incident occurred sometime between 4.45pm and 5pm on Saturday 2 March 2019.
A man aged in his 50s was jogging in Hinton Wood Avenue when he became involved in an incident involving two youths on pedal cycles.
It was reported that the youths followed the man on their bikes as he ran toward Lymington Road and into Wharncliffe Road, before heading down Beacon Drive and into Ranelagh Road.
In Ranelagh Road the man was allegedly challenged by a man and woman who arrived on the scene in a white vehicle. He reported that he was assaulted by this man and woman as well as one of the youths and sustained head injuries that required an assessment in hospital.
A 36-year-old local woman and a 33-year-old local man have been arrested on suspicion of assault occasioning actual bodily harm and have been released under investigation as officers continue to make enquiries.
Police Constable Paul Mellor, of Dorset Police, said: “Our investigation into this incident is ongoing and I am appealing to anyone who witnessed this altercation, or who has any information that can assist our enquiries, to contact us.”