A spate of kidnappings by Abu Sayyaf raises concerns that the Islamist militant group's strength is growing.
Philippine government official/AP/FILE
Just a few years ago, the Islamist militant group Abu Sayyaf was thought to be a spent force, after they were targeted in a successful US-backed military campaign. But a spate of kidnappings in recent months has fueled concerns that the militants have regrouped under new leadership.
In the latest incident, a Sri Lankan peace activist was abducted on Feb. 13, one of 10 hostages now in Abu Sayyaf's hands.
The three aid workers were kidnapped Jan. 15 on the island of Jolo, part of an island chain in the Philippines' deep south that's long been a hotbed for Islamic militancy. (Click here to see a map of the region.)