OUTSIDE BAGHOUZ, Syria (AP) — The three Islamic State fighters emerged from the group's last bastion in eastern Syria on Friday acting as though they wanted to surrender, but when they reached the U.S.-backed forces that have them surrounded they blew themselves up, killing six people.

The attacks underscored the struggles faced by the Kurdish-led Syrian Democratic Forces as they try to flush the extremists out of a tent camp in eastern Syria built over a labyrinth of caves and tunnels — all that remains of a self-declared caliphate that once sprawled across large parts of Syria and neighborin...