WASHINGTON (Reuters) -U.S. House of Representatives Speaker Nancy Pelosi announced Thursday there will be a new House committee to investigate the Jan. 6 attack on the U.S. Capitol, after Senate Republicans in May blocked the creation of an independent commission to probe the assault.

Speaking at a news conference, Pelosi, a Democrat, declined to spell out a timeline for the panel to investigate, saying it will be “as long as it takes.” She gave no details of the make-up of the panel, but made clear both parties would be expected to name members, saying she hoped that House Republican Leader Kevin McCarthy will appoint “responsible people” to the panel.

Pelosi said it would have been preferable to have an outside commission, and that she had not totally given up on that idea. The House passed legislation to set up an independent bipartisan commission, but Senate Republicans blocked it, saying existing committee probes as well as prosecutors’ investigations made it unnecessary.

“We see this as complementary, not instead of, and hopeful that there could be a commission at some point,” Pelosi said.

“The Capitol of the United States has always been a glorious beacon of democracy for the American people and the world,” Pelosi said. She said that the select committee will be “about seeking and finding the truth” about the events of Jan. 6.

(Reporting by Susan Cornwell; Editing by Chizu Nomiyama and Frances Kerry)