The man charged with planting two pipe bombs near the Democratic and Republican party headquarters on the eve of the Jan. 6 attack on the U.S. Capitol told the FBI he believed conspiracy theories about the 2020 election, according to two people familiar with the matter.

Brian Cole Jr., 30, is cooperating with the FBI, NBC News has reported, citing a separate person familiar with the matter. Cole was charged with leaving pipe bombs outside the Republican National Committee and Democratic National Committee in the hours before Donald Trump supporters stormed the U.S. Capitol.