WEST PALM BEACH, Fla. — President-elect Donald J. Trump, expressing lingering skepticism about intelligence assessments of Russian interference in the election, said on Saturday evening that he knew “things that other people don’t know” about the hacking, and that the information would be revealed “on Tuesday or Wednesday.”

Speaking to a handful of reporters outside his Palm Beach, Fla., club, Mar-a-Lago, Mr. Trump cast his declarations of doubt as an effort to seek the truth.

“I just want them to be sure because it’s a pretty serious charge,” Mr. Trump said of the intelligence agencies. “If you look at the weapons of mass destruction, that was a disaster, and they were wrong,” he added, referring to intelligence cited by the George W. Bush administration to support its march to war in 2003. “So I want them to be sure,” the president-elect said. “I think it’s unfair if they don’t know.”

He added: “And I know a lot about hacking. And hacking is a very hard thing to prove. So it could be somebody else. And I also know things that other people don’t know, and so they cannot be sure of the situation.”