Donald Trump said Thursday morning that he was being “sarcastic” about asking Russians to find Hillary Clinton’s missing e-mails from her tenure as secretary of state.

He also said that he didn’t know who had hacked into the Democratic National Committee’s e-mails.

“Of course I am being sarcastic,” Trump told Fox News’ Brian Kilmeade in an interview. “And they don’t even know frankly if it’s Russia. They have no idea if it’s Russia, if it’s China, if it’s somebody else. Who knows who it is?”

Trump set off a firestorm Wednesday when he encouraged Russia to hack into Clinton’s e-mails.

“Russia, if you’re listening, I hope you are able to find the 30,000 e-mails that are missing,” he said to a room full of reporters at Trump National Doral golf course. “I think you will probably be rewarded mightily by our press.”

FBI Director James Comey criticized Clinton’s use of e-mails stored on a private server but the Justice Department declined to prosecute earlier this month. Clinton’s lawyers had turned over thousands of work-related e-mails for the investigation but deleted thousands that they concluded were personal.

Trump also commented Wednesday about the DNC’s more than 19,000 leaked e-mails that were published by WikiLeaks July 22. The e-mails showed that staff were working to help elect Clinton rather than Bernie Sanders, leading the chairman, U.S. Rep. Debbie Wasserman Schultz of Florida, to announce she would step down. The Clinton campaign alleged that Russia had hacked the DNC e-mails to help Trump.

On Wednesday, Clinton’s adviser Jake Sullivan fired back:

“This has to be the first time that a major presidential candidate has actively encouraged a foreign power to conduct espionage against his political opponent. That’s not hyperbole, those are just the facts. This has gone from being a matter of curiosity, and a matter of politics, to being a national security issue.”

Kilmeade also asked Trump about his comments on Russian President Vladimir Putin.

Kilmeade: “When you look at Vladimir Putin you said he is a great leader of his country but he is also a guy.”

Trump replied: “No I didn’t say that. I said he is a better leader than Obama. . If we could get along with Russia I think that would be a good thing not a bad thing.”

Trump also said that Russia has taken actions such as invading Ukraine or Russian aircraft coming close to American ships “because they have no respect for our leader.”