Federal agents were rammed and boxed in by multiple vehicles near a U.S. Immigration and Customs Enforcement (ICE) facility in Broadview, Illinois, early Friday morning, forcing them to open fire after one of the attackers brandished a firearm, according to the Department of Homeland Security.

“This morning, during routine patrolling in Broadview, in the same area of Chicago that law enforcement were assaulted yesterday, our brave law enforcement officers were rammed by vehicles and boxed in by 10 cars,” DHS Assistant Secretary Tricia McLaughlin announced in a social media post.

Agents trapped inside their vehicles were unable to move and forced to exit on foot. “One of the drivers who rammed the law enforcement vehicle was armed with a semi-automatic weapon. Law enforcement was forced to deploy their weapons and fire defensive shots at an armed U.S. citizen who drove herself to the hospital to get care for wounds,” McLaughlin said.

She confirmed the woman had previously been flagged by U.S. Customs and Border Protection (CBP) as a security threat. “The armed woman was named in a @CBP intelligence bulletin last week for doxing agents and posting online, ‘Hey to all my gang let’s fk those mother f*ers up, don’t let them take anyone.’”

McLaughlin continued in her statement.