UK-US-IRAN: U.S. officials are investigating possible violations of sanctions against Iran by Royal Bank of Scotland, Britain's Financial Times reported Wednesday..

ROUND TWO: Another British bank, Standard Chartered, agreed this month to pay $340 million to a New York regulator to settle accusations that it hid illegal transactions with Iran and violated U.S. sanctions law. Investigations by other U.S. agencies are continuing in that case.

The Financial Times says the U.S. Department of Justice and the Federal Reserve investigations were prompted by voluntary disclosures made by the bank about 18 months ago.

TWO-PRONGED: RBS earlier this month revealed that various units of the bank group had been named as defendants in suits filed in the U.S. related to claims that it was involved in manipulating the London interbank offered rate (LIBOR), a widely used market index. RBS said it was cooperating with LIBOR investigations by U.S. agencies and by the Japanese Financial Services Agency, the European Commission and the Canadian Competition.