TRAFFIC tailbacks are building after a crash on a Hampshire motorway.

Two lanes of the M3 southbound are closed following the collision, which happened at about 2.30pm near Otterbourne.

Delays are building in both direction on the motorway and motorists are advised to check their routes before travelling.

Anyone with information on the crash can contact Hampshire Police on 101.

UPDATE 3pm: Both lanes have reopened, although traffic remains slow in the area.