The suspects -- a married couple and three other men -- were detained after a raid by anti-terrorism forces on three locations in the city of Bandung West Java, spokesman Yusri Yunus said.
Police claim the attackers were part of the IS-linked Jamaah Ansharut Daulah (JAD) network that has been blamed for a series of recent attacks in Indonesia including one in Jakarta in January 2016 that left four civilians dead.
"We found evidence in one of the suspects' houses. The evidence is a bomb made of chemical material," he told AFP.
Police allege the group got instructions on how to make the device from a blog post written by Bahrun Naim, an Indonesian who is fighting with IS in Syria.
Naim has been accused of directing a series of mostly- botched terror plots in his homeland in recent years.
Authorities in Indonesia, the world's most populous Muslim country, have been on heightened alert following several recent attacks claimed by Islamic militants.
In May suicide bombers killed three police officers at a bus station in Jakarta, while a gun and suicide attack in the capital in January last year that left four civilians and four assailants dead marked the first assault claimed by IS in Southeast Asia.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Access to Exclusive Premium Stories
Over 30 subscriber-only stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app