Following the attacks, police uncovered bombs at other churches and on Monday another family group of suicide bombers targeted a police station. Six civilians and four officers were wounded.
At least 11 people, including a suicide bomber, were killed and 41 injured on Sunday in bomb attacks on three churches in the Indonesian city of Surabaya.
The content of the films included footage from Syria and Iraq, as well as Isis attacks in France, and was meant to encourage those in the group to commit terrorist attacks, he said. Experts have warned for several years that when those fighters return, they could pose a significant threat.
Daesh claimed responsibility for all the attacks in statements carried by its Amaq news agency. "We stand ready to step up cooperation with the Indonesian side and other members of the worldwide community to jointly counter terrorist threats and challenges and uphold peace and tranquility of the region and the world", he said.
Three members of a third family also died when homemade bombs exploded in their apartment Sunday night, and three children survived. Children have no choice.
Twenty-five people have died since Sunday, including 13 militants and their children.
Indonesian President Joko Widodo condemned the attacks as "barbaric" and vowed that authorities would root out and destroy Islamic militant networks.
The top security minister, Wiranto, who uses one name, said the government will attempt to hasten passage of an updated anti-terrorism law that has languished in parliament. The motorcycles, which moved closely together, pulled up alongside a vehicle and four officers manning opposite sides of the checkpoint.
The attacks killed 25 people, 13 of whom were the suicide bombers, and injured dozens more.
And if the initial analysis by the police that the Jemaah Ansharut Daulah (JAD) is behind the recent attacks is accurate, then the local terrorist network has truly raised its game. Its leaders were killed in police raids and hundreds of militants were arrested.
The archipelago nation of some 17,000 islands has long struggled with radical militancy, including the 2002 Bali bombings that killed 202 people - mostly foreign tourists - in the country's worst-ever terror attack.
Tito said it was the first time that terrorists in Indonesia had taken along children in their suicide bombings. "If three families can be involved in two days' worth of terrorist attacks in Surabaya, surely there are more ready to act".
"A fire exchange has occurred, claiming one life aged between 39 and 41", East Java Police Headquarters Spokesperson Frans Barung Mangera said.
Television footage appeared to show a person on a motorcycle driving into the grounds of a church before a bomb was detonated.