CHILDREN are being warned to keep away from construction sites along the new Metro extension on Wearside.

Police and Railtrack have started a campaign to alert youngsters to the dangers of trespassing on the new lines and stations and officers will target the sites as part of a summer holiday crackdown.

More than 150 posters have been put up at construction sites urging children to stay out. They also carry police telephone numbers so members of the public can report anyone acting suspiciously.

The Metro extension is due to open in March next year, linking Sunderland with the rest of the network.