A CRASH is causing rush-hour delays on a Hampshire motorway.

The accident has blocked one lane of the M3 northbound between junctions 12 and 11.

It has caused heavy delays stretching as far back as junction 5 of the M27.

The travel service Romanse tweeted: "#M3 Northbound - reports of one lane BLOCKED between J12/A335 #ChandlersFord and J11/A3090 #Winchester due to an RTI, heavy delays backed onto #M27 J5."