Washington - The Obama administration said Wednesday it paid $1.3 billion in interest to Iran in January to resolve a decades-old dispute over an undelivered military sale, two days after allowing $400 million in cash to fly to Tehran.

State Department spokeswoman Elizabeth Trudeau says the U.S. couldn’t say more about the Jan. 19 payments because of diplomatic sensitivities. They involved 13 separate payments of $99,999,999.99 and final payment of about $10 million. There was no explanation for the Treasury Department keeping the individual transactions under $100 million.

The money settles a dispute over a $400 million payment made in the 1970s by the U.S.-backed shah’s government for military equipment. The equipment was never delivered because of the 1979 Islamic Revolution that overthrew the shah and ended diplomatic relations between the U.S. and Iran.

On Jan. 17, the administration paid Iran the account’s $400 million principal in pallets of euros, Swiss francs and other foreign currency, raising questions about the unusual payment. The $1.3 billion covers what Iran and the U.S. agreed would be the interest on the $400 million over the decades.... Read More: VIN