Video game loot boxes have been blamed for a "deeply concerning" rise in the number of children with a gambling problem.
The findings noted that close to a million young people had been exposed through loot boxes in video games.
Loot boxes are a stash of mystery in-game items, tempting players with the possibility that any of the crates they buy could contain something of huge value.
Publishers and developers have long been searching for ways to tempt players to spend extra money on their games.
Loot boxes have been banned in Belgium and the Netherlands as they are deemed to be gambling.
In August it was announced that video game boxes across Europe would soon sport an icon warning parents of the potential for extra purchases.
Last October, the UK government said it was "monitoring convergence between gambling and video games closely" after a petition calling for gambling laws to include games marketed at children hit 10,000 signatures. »
