News of the alert comes after shots were reportedly fired at federal agents during an immigration enforcement operation.

The move comes as Washington escalates its enforcement efforts in the Windy City as part of President Donald Trump's efforts to crack down on crime in major cities and to implement mass deportations.

The Latin Kings street gang has reportedly issued a “shoot on sight” order against Customs and Border Protection agents in Chicago, prompting a security alert from federal authorities. CBP officials ...

“Officer/agents are reminded to maintain heightened situational awareness and exercise extreme caution when conducting enforcement activities,” the agency’s internal warning said. News of the alert ...