Donald Trump Says Missing EgyptAir Aircraft 'Blown Out of the Sky' At a fundraiser, he told the crowd, "You are 100% wrong" if you doubt his claim.

 -- EgyptAir Flight 804 has yet to be found — nor has a reason for its disappearance been officially declared — but Donald Trump is convinced he knows why the Cairo-bound aircraft went missing this morning.

"A plane got blown out of the sky," the presumptive Republican presidential nominee said at a fundraiser in Lawrenceville, New Jersey, tonight. "And if anything, if anybody thinks it wasn’t blown out of the sky, you are 100 percent wrong, folks. OK? You're 100 percent wrong."

Trump made the unsubstantiated claim while slamming Hillary Clinton for her apparent reluctance to use the phrase "radical Islamic terrorism."

"We had a terrible tragedy, and she said that Donald Trump talked about radical Islamic terrorism — which she doesn't want to use," Trump said. "She used a different term, because she does not want to use that term. She refuses to use that term."

Trump first attributed the EgyptAir flight's disappearance to terrorism several hours before the fundraiser, tweeting, "Looks like yet another terrorist attack. Airplane departed from Paris. When will we get tough, smart and vigilant? Great hate and sickness!"

Trump, though, may be taking a cue from Egyptian officials. As ABC News previously reported, Egyptian officials have suggested that the incident was more likely caused by terrorism than a technical problem.

“I don’t want to go to assumptions like others, but if you analyze the situation properly, the possibility ... of having a terror attack is higher than having a technical" failure, the Egyptian aviation minister told reporters today.