Hillary Clinton’s campaign chairman John Podesta hinted Tuesday that Republican rival Donald Trump’s campaign had received “advance warning” about the hacking of his emails.

On the campaign plane on Tuesday, Podesta pointed to former Trump adviser Roger Stone’s August tweet about him.

“A couple of months ago, Roger Stone confirmed that he was in touch with Julian Assange,” Podesta said.

Trust me, it will soon the Podesta’s time in the barrel. #CrookedHillary

— Roger Stone (@RogerJStoneJr) August 21, 2016

“I’ve been involved in politics for nearly five decades. And this definitely is the first campaign that I’ve been involved with in which I’ve had to tangle with Russian intelligence agencies,” he said.

Podesta confirmed that the FBI is investigating the recent hack of his emails. The recent dump of emails revealed excerpts of what were possibly Clinton’s paid speeches to financial institutions including Goldman Sachs.