Three British banks named in a US indictment relating to the Fifa corruption scandal are reviewing payments set out in the document.
Barclays, HSBC and Standard Chartered were allegedly used to transfer cash as part of the conspiracy.
Standard Chartered said last week it was aware two payments it had cleared were mentioned in the indictment and it was looking into them. Barclays and HSBC have not commented.
But it emerged today Barclays was understood to be reviewing specific transactions while the HSBC payments were believed to be the sort of transactions that were routinely looked into.
It comes amid calls to boycott the World Cup after under-fire Fifa president Sepp Blatter was re-elected as leader on Friday, despite the arrests of football officials on suspicion of decades of bribe taking.
Meanwhile, the Serious Fraud Office has said it is actively assessing “material in its possession” relating to the corruption allegations.
The three UK-based banks named in the US indictment have a chequered history in recent years, with HSBC in 2012 paying a 1.9 billion US dollar (£1.2 billion) fine over money laundering related to drug cartels and so-called rogue states.
Standard Chartered faced a US penalty of 667 million US dollars (£436 million) around the same time after allegations that it breached sanctions with Iran.
Barclays was last week hit with charges of £1.5 billion from US and UK regulators over the foreign exchange rigging scandal, to add to the large sums it has already had to pay for other scandals including the fixing of benchmark rate Libor.