POLICE are appealing for witnesses after a woman was airlifted to hospital with life-threatening injuries following a road collision this afternoon.

Emergency services were called to Alexandra Road, opposite Downsland Road, in Basingstoke at around 3.50pm this afternoon.

A 33-year-old female pedestrian was involved in a collision with a grey Yamaha motorbike and was airlifted to Southampton General Hospital with life-threatening head injuries.

A 26-year-old man and three young children were also left with minor injuries and were treated by paramedics at the scene.

The motorcyclist - a man in his twenties - was treated by paramedics and is helping officers with their inquiries.

No arrests have been made at this stage.

Anyone who saw either the bike or pedestrian prior to the collision is asked to contact Inspector Andy Storey on 101 quoting operation Mackrel or via the website www.hampshire.police.uk/internet/do-it-online/online-forms/message-for-officer.html.

You can also call Crimestoppers on 0800 555 111 where information can be left anonymously.