The House committee investigating the Capitol attack issued five new subpoenas on Monday, focusing on allies of former President Donald J. Trump who helped draw crowds to Washington before the riot on Jan. 6, including the political operative Roger J. Stone Jr. and the conspiracy theorist Alex Jones.
The subpoenas, which come after the committee has interviewed more than 200 witnesses, indicate that investigators are intent on learning the details of the planning and financing of rallies that drew Mr. Trump’s supporters to Washington based on his lies of a stolen election, fueling the violence that engulfed Congress and delayed the formalization of President Biden’s victory.
“We need to know who organized, planned, paid for and received funds related to those events, as well as what communications organizers had with officials in the White House and Congress,” said Representative Bennie Thompson, Democrat of Mississippi and the chairman of the committee.
Mr. Stone promoted his attendance at the rallies on Jan. 5 and 6, and solicited support to pay for security through the website stopthesteal.org. While in Washington, he used members of the Oath Keepers as personal security guards; at least one of them has been indicted on charges that he was involved in the Capitol attack.
In a statement, Mr. Stone said he had not yet been served with the subpoena and denied any involvement with the violence.
“I have said time and time again that I had no advance knowledge of the events that took place at the Capitol on that day,” he said.
Mr. Jones helped organize the rally at the Ellipse near the White House before the riot — including by facilitating a donation from Julie Jenkins Fancelli, the heiress to the Publix Super Markets fortune — to provide what he described as “80 percent” of the funding, the House committee said. Mr. Jones has said that White House officials told him that he was to lead a march to the Capitol, where Mr. Trump would speak, according to the committee.
Mr. Stone and Mr. Jones were among the group of Trump allies meeting in and around the Willard Intercontinental Hotel near the White House the day before the riot.