The suicide bombers carried out attacks against three churches on Sunday in Surabaya, the second largest city in Indonesia, killing at least 13 people and injuring 40, officials said.
ISIL claimed responsibility for suicide bombing attacks through the group’s Amaq news agency without providing any evidence.
Police said the family that carried out the attacks on Sunday was among the 500 ISIL supporters who had returned from Syria.
“This act is barbaric and is beyond the limits of humanity, causing casualties among members of society, the police and even innocent children,” said Indonesia’s President Joko Widodo, during a visit to the scene of the attacks
Reuters reported that a family of six launched the attacks.
“The husband drove the car, an Avanza, which contained explosives and slammed it against the door in front of that church,” East Java police spokesman Frans Barung Mangera told reporters at the regional police headquarters in Surabaya.
The wife and two daughters were involved in an attack on a second church and in the third church, “two other children rode on the motorcycle and had the bomb in their lap,” said Mangera.
The two daughters were between 12 and 9 years old, while the other two, believed to be children of the man, were 18 and 16 years old, police said.
The attacks, the deadliest in the country since 2005, began around 7:30 a.m. local time when three churches were apparently attacked in a coordinated manner.
The first attack in the church of Santa Maria took four fatalities, one of them was the alleged terrorist disguised as one who had come to hear the sermon.
The other two explosions went to the Christian Church of Diponegoro and the Central Church of Pentecost.
The three apparently coordinated, deadly explosions occurred within 10 minutes of each other, police said.
At least 41 injured people were taken for medical treatment, including two police officers, said East Java police spokesman Mangera.
It is also likely that the radical group is linked to a hostage incident in a prison near Jakarta that involved Islamist militants last week.
As the holy month of Ramadan approaches this week, Indonesia has been on high alert after a series of conspiracies and recent attacks by militants inspired by ISIL.
- Guns, Germs, and Steel
- Multiple explosions and shootings in the eastern Afghan city