The Counterterrorism Yearbook 2017: Indonesia | The Strategist

"Since the emergence of IS in late 2013, there have been predictions that it would further radicalise terrorists in Indonesia, leading to a return to the types of mass-casualty attacks not seen since the Marriott and Ritz-Carlton hotel bombings in Jakarta in August 2009. But for much of 2014 and 2015, IS’s main concern was to attract Southeast Asians to Syria and Iraq as fighters. It made little practical effort to promote operations within Indonesia, Malaysia and the Philippines—the sources of most of its Southeast Asian fighters. The number of returnees from the Middle East increased over 2016, suggesting that they will pose a mounting security threat for Indonesian counter-terrorism officials. In addition to pro-IS groups intensifying their activity, other sections of the jihadist community, particularly Jemaah Islamiyah (JI), are showing signs of consolidation, though they haven’t been involved in recent violent activity."