Federal law enforcement officers say they have arrested several illegal immigrants following traffic stops in Macomb County’s two largest cities this month. According to the U.S. Border Patrol Marysville Station, four illegal aliens were arrested Jan. 13 in Sterling Heights. Meanwhile, U.S. Border Patrol Detroit Station agents arrested two people labeled special interest aliens (SIA) from Venezuela in Warren in partnership with Warren police. The arrests were made Jan. 18 during a traffic stop in Warren, officials said Thursday in a social media post. In a separate incident, agents arrested an illegal alien from Mexico during a traffic stop.