Former Secretary of State John Kerry publicly admitted Wednesday he’s met with Iranian officials at least “three or four times” in recent months; raising serious concerns over whether the senior Obama official is engaging in “shadow diplomacy” behind-the-scenes.

Kerry was speaking with radio host Hugh Hewitt this week when he was asked about President Trump’s decision to withdraw the United States from the Obama administration’s signature Iranian nuclear deal.

“I think I’ve seen him three or four times,” Kerry said, referring to Iranian Foreign Minister Javad Zarif.

Kerry’s comments come months after President Trump unloaded on the former presidential candidate over his “shadow diplomacy” aimed to derailing the Commander-in-Chief’s foreign policy.

“The United States does not need John Kerry’s possibly illegal Shadow Diplomacy on the very badly negotiated Iran Deal. He was the one that created this MESS in the first place!” tweeted Trump last May.

The United States does not need John Kerry’s possibly illegal Shadow Diplomacy on the very badly negotiated Iran Deal. He was the one that created this MESS in the first place! — Donald J. Trump (@realDonaldTrump) May 7, 2018

Read the full transcript here.