The OFT said they are concerned that children and parents are subject to "unfair pressure" to purchase, when playing on web or app based games, which can lead to "substantial costs".
The OFT is not seeking to ban in-game purchases, but the games industry must ensure it is complying with the relevant regulations so that children are protected. We are speaking to the industry and will take enforcement action if necessary.
More top news
The Spaniard has overseen 10 straight victories since taking charge at the Etihad Stadium, including a derby win over Manchester United.
Mary Berry has "absolutely no plans to retire", despite reports she only intends to work for another year, her agent has said.
China has started searching for extraterrestrial life with the 'world's largest telescope' which measures half a kilometre in diameter.