President Donald Trump on Monday criticized Iran’s continued demands on uranium enrichment as part of the terms of a nuclear deal with the United States.

Trump made the comments while speaking to reporters from the State Dining Room about his phone call with Israeli Prime Minister Benjamin Netanyahu earlier in the day. Trump said the call went “very well” but declined to offer specifics beyond acknowledging that Iran was “the main topic.” He also added that the conflicts in Gaza and Lebanon were also discussed. Israel’s Channel 12 reported that the call lasted around 40 minutes. 

“They [Iran] are good negotiators, but they’re tough. Sometimes they can be too tough, that’s the problem. So we’re trying to make a deal so that there’s no destruction and death. We told them that. I have told them that. I hope that is the way it works out. It might not work out,” Trump said.

Asked what the main impediment to getting a deal with Iran is, Trump replied: “They’re just asking for things that you can’t do. They don’t want to give up what they have to give up, you know what that is. They seek enrichment, we can’t have enrichment. We want just the opposite. And so far, they’re not there. I hate to say that because the alternative is a very, very dire one, but they’re not there. They have given us their thoughts on the deal and I’ve said it’s just not acceptable.”

Netanyahu convened a meeting of his security cabinet immediately following the Monday morning call, for which neither the White House nor the Prime Minister’s Office offered readouts. 

Nuclear talks between the U.S. and Iran have been ongoing since March. Trump said that negotiators will meet next on Thursday. An Iranian Foreign Ministry spokesperson said on Monday that Tehran plans to send the U.S. a counteroffer to the proposal the Trump administration presented in the “coming days.”