A1M motorway closed near Welwyn after motorbike crash

Image caption, The A1M was closed in both directions between junction 6 for Welwyn and junction 7 for Stevenage

Part of the A1M motorway in Hertfordshire is closed after a motorbike crash.

The road was closed both ways between junctions six and seven near Welwyn following the crash at about 11:25 GMT. One southbound lane has reopened.

Two people, riding on a motorbike, were seriously injured and an air ambulance landed at the scene. There are extensive delays in the area.

Officers believe two other vehicles may have been involved.

Image caption, Motorists were asked to avoid the area