U.S. Capitol Police arrested and charged more than 300 protesters Thursday afternoon for unlawfully demonstrating inside Senate office buildings following the FBI's release of a report that found no corroborating evidence regarding sexual assault allegations against Supreme Court nominee Brett Kavanaugh.

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Around 3:30 p.m. local time, police assigned to the Capitol grounds arrested 293 people for crowding, obstructing, or incommoding in the Hart Senate Office Building.

Nearly two hours later, nine more people were taken into custody at the Dirksen Senate Office Building on the same charges.

All 100 U.S. senators have offices in either of the two buildings. The Senate is tasked with approving or denying all presidential nominations, including that of Kavanaugh.

[More: Amy Schumer among Kavanaugh protesters swarming Capitol Hill]

Police processed and released everyone at the sites of the arrests.

Washington law states people cannot block the entrances to public or private buildings and public sidewalks, among other places. The Capitol buildings are included in the list of places people cannot demonstrate.

Other protesters swarmed the streets near the Capitol for legal protests.