POLICE have launched an investigation after an attempted break-in at a Hampshire supermarket overnight.

Winchester firefighters and police were called to Tesco Express, in Springvale Road, Kings Worthy, at 1:05am this morning after a security device was activated.

The device is known as a ‘smoke cloak’ and sets off an alarm and releases smoke to stop the intruders.

It appeared to have worked, as nothing is believed to have been taken.