A series of attacks in Indonesia by suicide bombers on churches in the city of Surabaya were suspected to be carried out by the ISIS-inspired group Jemaah Ansharut Daulah (JAD), a spokesman for the country's intelligence agency said on Sunday.
Frans Barung, a spokesman for East Java's police, said one churchgoer was killed and 11 people suffered injuries.
A member of the police bomb squad unit examines the site of an explosion outside the Immaculate Santa Maria Catholic Church, in Surabaya, East Java, Indonesia May 13, 2018 in this photo taken by Antara Foto.
Indonesia, the most populous Muslim-majority country, has seen a resurgence of Islamist militancy in recent months.
"We have confirmed one died at the scene, one died at the hospital, two police officers were injured and there are some civilians injured", Mangera said. Another two died in a third attack at the cityâ€™s Pantekosta Church, Mangera said.
Recall, may 13, in the Indonesian city of Surabaya, East Java province, during the morning Sunday bombings of three churches.
The most serious incident was in January 2016 when four suicide bombers and gunmen attacked a shopping area in central Jakarta.
A few minutes later the second explosion occurred in a Protestant Church in Jalan Diponegoro (Diponegoro Jalan) - two known victims.
Television footage showed one church engulfed in fire, with thick, black smoke billowing up. Authorities were also investigating whether there was an explosion at a fourth church.
Indonesia is home to significant numbers of Christians, Hindus and Buddhists but there are concerns over rising intolerance.
Surabaya is Indonesia's second-largest city. The Islamic State group has claimed responsibility.
This is a developing story.