Two Bosnian brothers who say they can drink as much as they want without feeling drunk have been told they each have a spare set of fully functioning kidneys.

Josip Galic, 69, from Kucetine in Bosnia said: "I had a car accident and doctors discovered I had four kidneys. That surprised me, but at least it explained why I could drink all my friends under the table, and never had a hangover."

He added it was a further surprise when his brother found out after a visit to the doctor that he had four kidneys as well.