Longtime GOP strategist Roger Stone on Tuesday fired back at Democrats on the House Intelligence Committee who have accused the former informal Trump campaign adviser of lying to Congress as part of his testimony for the Russia probe.

"If Congressman Swalwell or Congressman Castro or Congressman Schiff have evidence of Russian collusion or WikiLeaks collaboration on my part let them produce it. They have none,” Stone told Hill.TV on Tuesday, referring to Democrats on the panel.

Stone bemoaned the questioning from lawmakers, claiming it has devolved into "perjury traps or some other highly trumped-up process crime – it's ridiculous."

"My testimony before the House Intelligence Committee is completely 100 percent accurate ... I'm no longer interested in the frivolous word games, of the parsing of the words, the immaterial or I should say nonmaterial, hairsplitting," he said.

Moments earlier, Intelligence Committee member Rep. Eric Swalwell (D-Calif.) told reporters that he believes Stone lied under oath to members of the panel. Schiff, the top Democrat on the panel, has also said Stone could face charges of lying to Congress.

“[Stone] had to update his testimony a number of times,” Swalwell said. "There were glaring omissions of contacts they had that they did not give to us when they were asked about them with Russians.”

Stone and Swalwell found themselves in close proximity on Capitol Hill Tuesday as they both attended the Judiciary Committee’s hearing with Google CEO Sundar Pichai, who was fielding questions on the tech giant’s privacy practices.