"Three individuals were arrested on Sunday as part of an ongoing investigation into money laundering," said a statement from Her Majesty's Revenue and Customs, a government agency.
"This includes two 35-year-olds (a male and a female) from the Croydon area and a 49-year-old male from the Wembley area. These individuals were arrested, questioned and have been bailed pending further investigation."
Croydon and Wembley are suburbs of London. A source said the arrests were linked to allegations that members of the Pakistan cricket team were involved in a betting scam, although a spokeswoman for HM Revenue and Customs refused to confirm this or give further details.
The International Cricket Council (ICC) has promised "decisive action" if newspaper allegations, that a middleman took money to arrange for Pakistani players to bowl no-balls against England last week, prove to be true.
The News of the World claimed it had paid Mazhar Majeed for advance details of three no-balls in the Test match at Lord's in London.
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