A Bulgarian customs officer who stole a gadget-packed phone was caught when its owner, the US Ambassador, activated the GPS program.

Ambassador John Beyrle activated the phone's GPS - Global Positioning System - to locate it in the officer's pocket.

He was travelling from Varna to Hungary when his mobile phone went missing while his hand luggage was being x-rayed.

Airport staff searched for the device, but all the customs officers claimed that they hadn't found a phone.

But the high-tech device was equipped with GPS and the Ambassador just had to open his lap-top for him to see the exact position of his phone within the customs officer's pocket.