A man with a history of anti-Immigration and Customs Enforcement (ICE) activity set off an "incendiary device" outside a Manhattan federal building that houses an immigration court, authorities said.

Video captured the moment the suspect poured a liquid and then ignited it outside 26 Federal Plaza, sparking a massive fire. FBI Assistant Director in Charge James Barnacle said the suspect used fireworks to set the blaze.

A man with a history of anti-Immigration and Customs Enforcement activity set off an "incendiary device" outside a federal building in Manhattan, officials said.

Obtained by ABC News

Two people -- a federal employee and a civilian -- suffered minor injuries and were treated and released, officials said.

Barnacle called it an "anti-government attack on a federal facility." He said the suspect had an incendiary device, a pellet gun and a sign reading "ICE Off Our Streets."

The suspect was taken into custody, the FBI said, and the FBI New York Joint Terrorism Task Force is investigating.

26 Federal Plaza in New York City.

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