Even as the world reeled over the attacks in Paris last Friday, a terror group in the Philippines was likely preparing to behead Bernard Then Ted Fen.
The engineer, who had been kidnapped in May in the Malaysian state of Sabah, was reportedly killed in the jungles of the Philippines' Sulu province early this week, after militants from the Abu Sayyaf group received a smaller ransom payment than they demanded.
The killing, in the wake of the deadly events in Paris, has brought new attention to Southeast Asia's own terrorist networks, many of which are supporters of the Islamic State of Iraq and Syria (ISIS).
While the region has seen a number of high-profile attacks in the past two decades, experts say its networks don't pose as great of a threat as those in neighboring South Asia. Still, lawmakers are paying close attention, especially to Indonesia, Malaysia and the Philippines because they have the biggest terror groups, Control Risks told CNBC.
Here are the key facts on the region's major militant organizations: