High-pitch alarm quietens youths

A device which emits a high-pitched noise has been installed outside a shop in Oxfordshire to cut the number of anti-social behaviour incidents.

A mobile "mosquito" alarm, which can only be heard by younger people, has been placed by the Co-op outside its store in Ladygrove, Didcot.

Parents have been campaigning to get the device fitted, and it is hoped it will stop large groups congregating.

It has been installed at the same time a youth club is due to open nearby.