A suicide attack on a police station in the Indonesian city of Surabaya on Monday was carried out by a family of five on two motorcycles, police said.
It came after another bombing of three churches perpetrated an attack on Sunday Group of Islamic State (IS)
An eight-year-old girl has survived the recent attack, police say
Indonesia is the most populous country of the majority of Muslims.
The archipelago, with its 260 million inhabitants, has seen a renaissance of militant Islamists in recent months, and the attacks in Surabaya have raised concerns about the power of the jihadist networks.
Video footage of the recent police attack HQ shows two motorcycles approaching a checkpoint just before the explosion. Six civilians and four police officers were injured, the authorities said.
What preceded the recent attack
Indonesia was on high alert after a Sunday bombing by one family in three churches in Surabaya. Www.mjfriendship.de/de/index.php?op…=view&id=1
In the first attack, the 16- and 16-year-old sons rode motorcycles to the Catholic Church of Santa Maria at 07:30 local time (00:30 GMT) and detonated explosives carrying them.
Following reports of his wife and daughters being thrown out of circulation, the father, Dita Oepriarto, drove his own bomb-laden car into the grounds of the Surabaya Center Pentecostal Church, police said.
Authorities originally said the family of six had been among hundreds of Indonesians who had returned from conflict-ridden Syria but have since said that the family did not travel there
The coordinated attacks killed 13 people and injured more than 40. They were the deadliest bombings in Indonesia in more than a decade.
- In the house of Indonesia's most notorious IS militant
police Oepriarto tells the local branch of Jemaah Ansharut Daulah (JAD), an Indonesian IS-inspired network.
Separated on Sunday:
- A bomb exploded in a housing complex in Surabaya, killing three family members the police said might have planned an attack
- Police said they had four suspected members of JAD killed in Cianjur, West Java province and arrested two others
How did the government react?
President Joko Widodo has described the attacks as "cowardly, unworthy and inhumane".
"There will be no compromises on the ground to stop terrorism," he said.
Authorities on Monday said police, backed by military forces, would increase security across the country.
What is the history of militancy in Indonesia?
The Southeast Asian country has long struggled with Islamist militancy. His worst terrorist attack was in Bali in 2002, when 202 people – mostly foreigners – were killed in an attack on a tourist district.
This attack was carried out by the militant Jemaah Islamiah (JI) network.
In recent years, however, there have been a number of attacks by the IS:
- Four civilians and four assailants were killed in a series of explosions shootings in central Jakarta in January 2016; the group's first attack
- In February of this year, several people were injured in a sword attack in a church in Sleman, Yogyakarta. Police said the attacker had previously tried to join IS in Syria