Police in Scotland are working with retailers to mark liquor bottles with invisible ink and track down adults who illegally buy alcohol for underage youth, the Scotsman reported July 22.

Under the program, retailers mark bottles with invisible-ink pens before sales are made; when police seize alcohol from youth, they use an ultraviolet light to read the markings. Closed-circuit TV video in stores is then used to determine who bought the alcohol.

"We hope this scheme works as a deterrent to adults buying alcohol for children, because we can find out who they are," said police inspector Richie Adams.