Emergency services are dealing with a collision in Lincolnshire, after which a male motorcyclist has been seriously injured.
The crash on the A1 at Colsterworth happened just before 12.30pm on Thursday, January 28 close to the flyover on the A1 near to Colsterworth services, where it meets the A151.
Police say the incident involved just one vehicle, a motorbike. The male rider of the bike has been seriously injured.
The road has been closed to allow for access for emergency services vehicles and for recovery work to be carried out.
Motorists are asked to avoid the area and seek alternative routes if possible.
Anyone who witnessed the incident should contact the Lincolnshire Police collision witness hotline on 01522 558855 or the non-emergency number 101 quoting incident 146 of January 28.