Indian investigators said that Ansari was considered a key player in the Pakistan-based Islamic terror group Lashkar-e-Taiba's plans for attacks on India. They say he was so central to the Mumbai attack plans he was among those giving orders by the minute to the attackers or directing them on their cell phones from a control room in Karachi, Pakistan during the Nov. 26-28 bloodbath.
The investigators spoke on condition of anonymity because they were disclosing sensitive information.
Ansari's interrogation is expected to bolster the Indian government's accusations -- and accepted as a fact by most ordinary Indians -- that Pakistan was behind the attack, the most brazen terrorist operation on India's soil. His arrest is a rare piece of good news for a government reeling from economic and political troubles.
"Clearly there was state support for the 26/11 massacre," Home Minister Palaniappan Chidambaram said Friday.
Indian investigators say Ansari has already told them that Pakistani intelligence officials were in the control room during the 60-hour siege -- corroborating testimony by American terrorist suspect David Coleman Headley, who said during his Chicago trial last year that Pakistani Inter-Services Intelligence (ISI) officials were involved.
Image: On the left - A picture of Sayed Zabiuddin alias Abu Jundal, one of the handlers in 26/11 Mumbai attacks. On the right - A picture of Rehana Begum, mother of Abu Jundal or Sayed Zabiuddin Ansari.