Police are appealing for witnesses and information following a road accident near Bordon.
They were called at 3.30pm on Friday following reports of a collision between a motorbike and a white van towing a trailer.
This occurred on the northbound carriageway of the A3 near the slip road at Longmoor.
The rider of the motorcycle, an 18-year-old from Bordon, suffered an ankle injury and the driver of the van did not stop at the scene.
A police spokesperson said: "We have already spoken to a number of witnesses but would like to appeal to anyone who has information and has not already spoken to us to come forward.
"We would particularly like to speak to anyone with relevant dash cam footage of this incident and anyone who could identify the van involved."
Anyone with information should report it online via the Hampshire and Isle of Wight Constabulary website, or call 101, quoting reference 44230239372.