Michael Flynn walks down the White House colonnade on the way to meet Japanese Prime Minister Shinzo Abe in Washington, February 10, 2017. Photo:REUTERS/Jim Bourg

US President Donald Trump on Friday didn't rule out pardon Michael Flynn, his former national security adviser who has pleaded guilty to making false statements to the FBI in special counsel Robert Mueller's Russia probe.

"I don't want to talk about pardons for Michael Flynn yet. We'll see what happens," Trump told reporters Friday morning.

"Let's see. I can say this: When you look at what's gone on with the FBI and with the Justice Department, people are very, very angry." he said.

Flynn pleaded guilty on Dec. 1 to a charge of making two false statements to the Federal Bureau of Investigation (FBI) about his interactions with Russian Ambassador Sergey Kislyak after the 2016 US elections and before Trump's January inauguration. He is the first senior White House official to be charged in the Mueller's probe.

In August, Trump pardoned former Arizona sheriff Joe Arpaio, who was convicted of criminal contempt for ignoring a judge's order not to detain suspected undocumented immigrants.