Michael Flynn's son rages at the Washington Post over reporting on mishandling of classified info

The son of Lt. Gen. Mike Flynn, who will be President-elect Donald Trump's national security adviser, raged on Twitter at The Washington Post over a story about Flynn sharing classified information.

The Post reported Wednesday that while Flynn was serving as US military intelligence chief in Afghanistan, he was investigated for "inappropriately" sharing classified information with foreign military officers.

Flynn was not disciplined or reprimanded after the investigation was finished, according to the Post.

Flynn's son, Michael Flynn Jr., protested the story on Twitter, calling it "fake news" and referring to the Post as the "Compost."

It's unclear what classified information Flynn shared, but sources familiar with the investigation told the Post that he was accused of telling allies about what other US agencies like the CIA were doing in Afghanistan.

A top surrogate for Trump, Flynn often attacked Democratic presidential nominee Hillary Clinton on the campaign trail over her use of a private email server while she served as secretary of state.