15 January 2016, 07:56 GMT
MOSCOW (Sputnik) – The 12 suspects are said to have links with the alleged mastermind of Thursday’s attacks, Bahrun Naim, Channel News Asia cited Indonesian police chief Badrodin Haiti as saying at a briefing.
They were detained a day after three people with purported links to the Daesh (Islamic State) jihadist group have been apprehended.
All seven victims of the Jakarta blasts have been identified, five of whom officials say were the assailants.
Daesh, which claimed responsibility for the attacks, is outlawed in many countries including Russia and the United States.
