"It is true we have arrested suspected terrorists," a Densus 88 member who spoke on condition of anonymity said here on Sunday.
The four suspected terrorists, identified by their initials as SUL, DAV, BAK, and RG are members of the .Jamaah Islamiyah (JI) network.
"One of the four suspects were arrested in Metro, one in Panjang and two in Pringsewu," he said..
During the raid, Densus 88 confiscated mobile phones, a laptop, an air rifle, a slingshot and several books related to jihad as evidence.
Related news: Densus 88 arrests 12 terror suspects in three provinces
Related news: Policeman killed in suspected terrorist attack
Related news: One terror suspect shot dead, four apprehended in Central Java