In September 2011, a JAT suicide bomber detonated explosives in a central Java church, killing himself and wounding dozens of others.[4]
On March 18, 2012, at least one of five armed men killed by Indonesian counter-terrorist forces in Bali was said to be a member of JAT.[5] The men were killed while awaiting the arrival of prostitutes at a local hotel.[6]
In 2012, the U.S. Department of State and the United Nations placed sanctions on the organization and named it as a terrorist group.[4][7][8]
In 2012, the group was thought to have approximately 1,500–2,000 members.[3]
The group remained very active in Indonesia in 2012, and it publicly maintained a website, as of January 2013.[9]Abu Bakar Baasyir's son, Abdul Rohim Ba'asyir was said to be JAT's PR Chairman and had worked for al-Qaeda in Afghanistan in 2002.[3]
In August 2014, the group suffered a split over Abu Bakar Baasyir's pledge of allegiance to Abu Bakr al-Baghdadi, leader of the Islamic State of Iraq and the Levant (ISIS).[3][10] Many members of the group, including top leaders, and Baasyir's sons reportedly disagreed with this decision over ideological reasons and left to form a new group called Jamaah Ansharusy Syariah,[11] led by Mochammad Achwan.
After 2014, the group was nearly defunct.