Federal law enforcement authorities in Portland arrested four illegal aliens after a laser strike was directed at two U.S. Customs and Border Protection helicopters over the weekend. The investigation used images captured by CBP pilots to identify the source location, leading to a joint search by DHS Homeland Security Investigations and ICE officers. All four arrested individuals — nationals of Mexico — had prior criminal or immigration violation histories.

Read more: Laser Strike on CBP Helicopter in Oregon Leads to Arrest of Four Illegal Aliens