Dozens of former intelligence officials signed a public statement Monday expressing doubts about the authenticity of the Hunter Biden emails published by the New York Post.

In the letter, first reported by Politico, more than 50 former intelligence officers said they believed the emails purportedly belonging to Biden, the son of the Democratic presidential nominee, Joe Biden, had "all the classic earmarks of a Russian information operation.".

"We want to emphasize that we do not know if the emails, provided to the New York Post by President Trump's personal attorney Rudy Giuliani, are genuine or not and that we do not have evidence of Russian involvement — just that our experience makes us deeply suspicious that the Russian government played a significant role in this case," they wrote in the statement.

The FBI is investigating whether the emails were part of a foreign intelligence operation, and the Washington Post reported that Giuliani was targeted by Russian intelligence