YOBS who hurled lumps of concrete off a bridge onto moving traffic below have been branded dangerous idiots. Three cars were struck by the missiles as they passed under the Welwyn By-Pass on the A1000. The gang of youngsters were spotted dropping their

YOBS who hurled lumps of concrete off a bridge onto moving traffic below have been branded dangerous idiots.

Three cars were struck by the missiles as they passed under the Welwyn By-Pass on the A1000.

The gang of youngsters were spotted dropping their deadly weapons on to unsuspecting drivers below at around 10pm on Monday.

A bonnet of a silver Ford Focus, driven by a 65-year-old Welwyn villager, was dented.

A 44-year-old WGC woman had the steering arm on her black Mitsubishi Colt damaged.

And a red Ford Focus, driven by a 68-year-old woman from Knebworth, suffered dents and scratches to the roof.

Luckily, no injuries were sustained.

Welwyn Hatfield community safety sergeant Keith Dean told the Welwyn & Hatfield Times: "It's totally ludicrous, they could have killed someone doing that.