Motorists have been warned to drive carefully after a spate of crashes on the county's roads tonight.

Police said the number of calls had been higher than average, and advised drivers to beware the greasy roads when travelling at night.

A car and a lorry collided on the Norwich-bound A11 at Silfield, near Wymondham, at 6.40pm. A police spokesman said one driver suffered minor injuries and that a vehicle had to be recovered from the central reservation. Both were recovered by 9.40pm.

One lane of the westbound A47 near King's Lynn was closed for more than an hour after a car left the road. Debris was spread across the carriageway in the crash near Tilney All Saints at 7.55pm. No one was injured in the collision, and police attended to recover the vehicl. The lane was reopened at 9.30pm.

In Browston, near Great Yarmouth, a man had to be released from his car by firefighters after a single-vehicle collision at 8.20pm. The red Renault Clio crashed on Browston Lane, which had to be closed to traffic as the scene was cleared. The driver did not suffer any injuries and the road reopened at 9.40pm.

Earlier, a lorry caught fire during the rush-hour on the Norwich-bound A47 at Hockering. Police were called and had cleared the vehicle by 5.45pm, though the road did not need to be closed.