National Police spokesman Rikwanto said Saturday that the 23-year-old Rio Priatna Wibawa is believed to be linked to Bahrun Naim, an Indonesian militant fighting with the Islamic State group in Syria who has tried to orchestrate attacks at home.
Rikwanto, who goes by one name, said bomb-making explosives were recovered from a laboratory in Wibawa's home in West Java province. They could create bombs three times as powerful as the Bali bombs.