Police are investigating an incident at a tourist attraction which left a woman in shock and a rare railway car damaged.

Vandals aimed a missile at a griddle car, one of only six catering type cars ever made, at the Weardale Railway, in County Durham, at about 4pm on Saturday.

It shattered the glass of the car and the woman, in her fifties, from Winlaton, near Gateshead, was treated by paramedics at the scene for shock.

A spokesman for Durham Police said they were unable to say whether it was a stone of an air rifle that caused the damage.

However, he said that two youths were spotted at the scene of the incident, near Frosterley, and that investigations were ongoing.