Britain's GCHQ has - in a rare statement - denied allegations of wiretapping Donald Trump.
The US president had claimed his predecessor Barack Obama had ordered his phones at Trump Tower wiretapped in a series of explosive posts on Twitter, which Obama resoundly denied.
Now, the allegations have been repeated to Fox News by a former judge, Andrew Napolitano, and GCHQ was dragged into the row because Napolitano claimed Obama had used GCHQ to spy on the president as he was campaigning.
White House Press Secretary Sean Spicer repeated the claims in a press conference, saying Obama had commissioned the agency to tap the phones.
He said: "Three intelligence sources have informed Fox News President Obama went outside the chain of command.
"He didn't use the NSA, the CIA, the FBI or the Department of Justice - he used GCHQ."
This statement was made shortly after the Senate Intelligence Committee said there was no evidence Obama had wiretapped Trump Tower.
In response, a spokesman for the agency said: "Recent allegations made by media commentator Judge Andrew Napolitano about GCHQ being asked to conduct 'wiretapping' against the then-president elect are nonsense.
"They are utterly ridiculous and should be ignored."