Assailants ambush, kill 3 police officers in Chile, troubling Chileans

santiago, chile — Armed assailants ambushed and killed three law enforcement officers in southern Chile on Saturday before setting their car on fire, authorities said, the latest attack on police to revive security concerns in the South American country.  It remains unclear who carried out the assault on Chile's national police force in the Biobio region some 400 kilometers (about 250 miles) south of Santiago, the capital. But a long-simmering conflict between the Mapuche Indigenous community and...