Two suicide bombers attacked a Roman Catholic church compound in Makassar on Sunday. Indonesian President Joko Widodo condemned the attack as an "act of terrorism."
Investigators say an engine throttle appears to have malfunctioned while the autopilot was engaged, possibly contributing to last month's crash of a Boeing 737-500 that killed all 62 people aboard.
Indonesia, an archipelago of 270 million people, sits along the Pacific "Ring of Fire," which leaves the country prone to earthquakes, tsunamis and eruptions.
The men have been held in U.S. custody since 2003, accused of planning and helping to carry out the deadly bombing attacks at a Bali nightclub in 2002 and at a J.W. Marriott Hotel in Jakarta.
A search and rescue operation was underway for Sriwijaya Air Flight 182, which lost contact with air traffic controllers shortly after takeoff from Jakarta, according to transportation officials.
Authorities said they know the location of the flight data recorder and cockpit voice recorder of the Boeing 737-500 that went down in the Java Sea with 62 people on board.
Mount Sinabung was dormant for 400 years before reawakening in 2010. Since then, it has erupted repeatedly. Dramatic photos and videos capture the latest eruption.
The archipelago nation has been hit by the virus far more than any other country in Southeast Asia. Epidemiologists says it is due to government failures.