A short-sighted Croatian pensioner sparked a police manhunt when he mistakenly picked up another boy instead of his grandson from a kindergarten.

Luka Karlovic, 70, arrived at a kindergarten in Zagreb to pick up his five-year-old grandson Petar.

But when an employee called for the boy to come and meet his grandfather another Petar stepped forward, and Karlovic drove off with him.

The mistake was only realised half an hour later when the missing boy's father turned up at the kindergarten to take him home.

Karlovic said: "My eyesight is getting a bit poor now and this was the first time I had seen my grandson for six months.

"I thought he looked a bit different, but I just put it down to the fact that kids can change a lot at that age in a short space of time."