Austrian bosses set up a CCTV system to catch a thief and found the culprit was a mouse.

The animal had been using the money to make its nest and developed a liking for 50-euro notes which it stole and chewed into tiny pieces once safely back in its lair.

A spokesman for the firm said: "Money was often left in the open although the room was locked, cash was still stolen. The video surveilance system recomended by the police was a last resort."