K9 police examine a site following attacks outside the Surabaya Centre Pentecostal Church - Surabaya Gereja Pantekosta Pusat - in Surabaya, East Java, Indonesia, on Sunday. Photo: AFP
Suicide bombings struck churches in a major Indonesian city during Sunday services, killing at least 11 people and wounding dozens in attacks which police said were carried out by a single family including two young girls.
The bombings at three churches in Surabaya - claimed by the Islamic State group - were the deadliest in years, as the world's biggest Muslim-majority country grapples with homegrown militancy and rising intolerance toward religious minorities.
The bombers - a mother and father, two daughters aged 9 and 12, and two sons aged 16 and 18 - were linked to local extremist network Jamaah Ansharut Daulah (JAD) which supports IS, said national police chief Tito Karnavian.
The mother, identified as Puji Kuswati, and her two daughters were wearing niqab face veils and had bombs strapped to their waists as they entered the grounds of the Kristen Indonesia Diponegoro Church and blew themselves up, he said.
The father, JAD cell leader Dita Priyanto, drove a bomb-laden car into the Surabaya Centre Pentecostal Church while his sons rode motorcyles into Santa Maria church, where they detonated explosives they were carrying, Karnavian said.
"All were suicide attacks but the types of bombs are different," he told reporters.
"This is related to JAD - Jamaah Ansharut Daulah."
The group, led by jailed radical Aman Abdurrahman, has been linked to several deadly incidents including a 2016 gun and suicide attack in the capital Jakarta that left four attackers and four civilians dead.
That was the first assault claimed by IS in Southeast Asia.
Police on Sunday said four suspected JAD members had been killed in a shootout during raids linked to the deadly prison riot this week.
Five members of Indonesia's elite anti-terrorism squad and a prisoner were killed in clashes that saw Islamist inmates take a guard hostage at a high-security jail on the outskirts of Jakarta. IS also claimed responsibility.
East Java police spokesman Frans Barung Mangera confirmed the deaths of 11 people with 41 injured in the coordinated attacks at about 7:30 am local time.
Images showed a vehicle engulfed in flames and plumes of thick black smoke as a body lay outside the gate of Santa Maria Catholic church, with motorcycles toppled over amid the mangled debris.