Of those killed, 13 were the perpetrators.
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. Experts have warned for several years that when those fighters return, they could pose a significant threat.
The Islamic State (known as IS) claimed responsibility for the church attacks.
Police said the situation in Surabaya is now "conducive" after the anti terrorist squad had identified the rings of terrorist and began a mopping up operation since Monday to root out suspected terrorists from their cells.
On Sunday night, a bomb in the Wonocolo low-priced housing complex in Sidoarjo exploded prematurely, killing a woman and her 17-year-old child, police said. Children have no choice.
All told, 26 people died in the two days of attacks including a total of 13 militants and their children.
Indonesian President Joko "Jokowi" Widodo condemned the attacks as "barbaric" and vowed that authorities would root out and destroy Islamic militant networks.
This is because the JI, and now the JAD, whose members have pledged their allegiance to ISIS, are indoctrinated to remain in a state of war, said Universitas Indonesia terrorism expert Ridlwan Habib.
Another family reportedly attacked a police station this morning, wounding 10 people including police officers. The motorcycles, which moved closely together, pulled up alongside a vehicle and four officers manning opposite sides of the checkpoint.
Inspector general Machfud Arifin told CNN Indonesia that the suicide attacks were carried out using a motorbike at St Mary's church and a auto at another.
The three families are believed to members of the pro-Isis Indonesian militant group, Jamaah Ansharut Daulah (JAD). Its leaders were killed in police raids and hundreds of militants were arrested.
In Surabaya, Indonesia, a family has involved an 8-year-old girl, in a suicide bomb attack in order to settle scores with an opposition. The incidents left 18 people killed including the family of six. Authorities say the surviving children are being treated for physical and mental issues and will eventually be placed with safe family members.
Earlier Tuesday, police searched the home of the family that bombed Surabaya's police headquarters.
The church attacks occurred within minutes of each other, according to Surabaya police spokesman Frans Barung Mangera.