POLICE rescued a "vulnerable autistic teenager" after he was seen walking on a busy dual-carriageway.

Officers were called to the A34 near Whitchurch at 3.50pm on Monday 2 January after drivers reported seeing a boy walking on the 70mph road.

Police performed a rolling road block, using cars to slow the traffic on the dual-carriageway.

Officers then rescued the teenager, who police say had run away from his guardians.

Police say the teenager was uninjured.