Britain's communications intelligence agency GCHQ has issued a statement denying it wiretapped Donald Trump during the USA presidential campaign.
America's National Security Agency (NSA) did not ask Britain's GCHQ to spy on Donald Trump when he was running for president, the organisation's director, Admiral Mike Rogers, has insisted.
Earlier on Sunday, California Republican Representative Devin Nunes, the chairman of the House Intelligence Committee, also pushed back against the claims, asserting that "there was no FISA (Foreign Intelligence Surveillance Act) warrant" for wiretapping.
Trump also hinted at the unsubstantiated allegation during a press conference with Germany's Angela Merkel, suggesting both of them had been surveiled by USA intelligence services - a reference to reports that United States spy agency the NSA had tapped Merkel's phone.
Trump reiterated those claims when he spoke in front of the media during his meeting with Angela Merkel, and though the British government already debunked those claims, Trump didn't offer an apology for making baseless claims.
Spicer later cited an unsubstantiated report from Fox News analyst Judge Andrew Napolitano, who said that GCHQ had colluded in obtaining intelligence on Trump.
Fox News has disassociated itself from the allegations, saying there is no evidence to back them.
"I suspect it is not [overstating it] to suggest this story comes from the Russian playbook", he said.
"So if the story comes from RT it would indeed be part of the standard Russian playbook with which Western democracies are now struggling to cope".
Asked about this on BBC radio, Sir Peter said: "We do know that the Russians are engaged in information warfare against the United States, the United Kingdom, a lot of western democracies".
Sir Peter Westmacott said the U.S. administration was playing a "dangerous game" and risked providing a "gift to our enemies" by damaging intelligence-sharing.
"They have peddled stories in the past which have turned out to be not true and which were deliberately put out by them".
President Donald Trump should apologize to former President Barack Obama for accusing him of ordering a wiretap on then-candidate Trump during the 2016 election, Rep. I didn't make an opinion on it.
Comey is also scheduled to speak about Trump's collusion with the Russians that resulted in Vladimir Putin intervening with the presidential elections past year.