The German government on Monday denied reports that U.S. President Donald Trump gave Chancellor Angela Merkel a bill for money owed to NATO.

“Reports that President Trump had presented the federal chancellor with a kind of bill with a concrete billion sum are not true,” said government spokesman Steffen Seibert.

On Sunday, the Times of London reported that Trump gave Merkel a bill for NATO defenses during her trip to Washington, D.C., earlier this month. The newspaper quoted an anonymous German minister describing the bill.