President Donald Trump said Sunday the United Kingdom's ambassador to the United States "has not served the UK well," after the ambassador called Trump "inept" and "incompetent" in leaked diplomatic cables.

Cables sent from the ambassador, Kim Darroch, back to London describe Trump as "inept," "insecure" and "incompetent," a UK government official confirmed to CNN. The cables were leaked to and first published by the Daily Mail.

When asked for his reaction to Darroch's comments, Trump told reporters, "No I haven't seen it, but, you know, we've had our little ins and outs with a couple of countries and I would say that the UK, and the ambassador has not served the UK well, I can tell you that."

"We're not big fans of that man and he has not served the UK well, so I can understand it," Trump said. "And I can say things about him but I won't bother."

In secret cables and briefing notes, Darroch warned the UK government that Trump's "career could end in disgrace," and described conflicts within the White House as "knife fights," according to the Daily Mail.

A UK government source tells CNN the memos described in the Daily Mail story, which span the period between 2017 to present day, are genuine.