President Donald Trump has announced that he will designate the left-wing activist group antifa as a “major terrorist organization” and recommended that those who fund it be “thoroughly investigated.”

In a post on Truth Social Wednesday, the president described the anti-fascist movement as “a sick, dangerous, radical left disaster” and pledged to look into the individuals and organizations providing it with funding “in accordance with the highest legal standards and practices.”

Antifa consists of a mix of loosely and closely-affiliated far-left extremist groups known for using violence in their purported fight against racism and fascism in the U.S. and elsewhere.

Earlier this week, President Trump told reporters that antifa was the source of many of the “professional agitators” that have clashed with immigration enforcement officials during the administration’s recent crackdown on illegal immigration.

Speaking from the Oval Office, the president said, “Antifa is terrible,” the president said. “These aren’t protests, these are crimes that they’re doing. They’re throwing bricks at cars of the ICE and Border Patrol. … They’re professional agitators. … They should be put in jail. What they’re doing to this country is really subversive.”

The group is also known for its role in the orchestrated violence that erupted in the summer of 2020 where activists attacked law enforcement and burned cities across the nation. Antifa members regularly wear masks to conceal their identities, wear all black clothing and use doxxing, violence and intimidation to further their agenda.

In January of this year, Representative Anna Paulina Luna (R-FL) introduced House Resolution 26 to designate antifa as a terrorist organization but the bill was referred to the House Committee on the Judiciary, where it has remained to this day.

Luna’s measure seeks to expose the reality of antifa-sponsored domestic terrorism, estimating that its affiliates are responsible for $2 billion in damages, 700 injured officers, and 30 deaths since 2020.

The accused shooter in last week’s assassination of conservative activist Charlie Kirk is believed to be linked to radical, far-left activism and, according to authorities, bullet casings found near the suspected murder weapon were inscribed with anti-fascist slogans.

Trump had commented the day after Kirk’s killing, “We have a radical left group of lunatics out there, just absolute lunatics, and we’re going to get that problem solved.”