They say he told them he was promised that his impoverished family would get about $1,200 if he died fighting for militant Islam.
They say he also told them that he and the nine gunmen killed during the attack were selected for the Mumbai rampage after intensive training by the extremist group Lashkar-e-Taiba, based in Pakistan.
According to Indian officials, the captive is from a village in the Punjab region of Pakistan. Pakistan's president, interviewed on CNN, expressed skepticism that the man is a Pakistani citizen.
The captive, Ajmal Amir Kasab, was arrested hours after the three-day rampage began. Photographs showed him walking calmly through Mumbai's main train station, holding an assault rifle.
(Copyright 2008 by The Associated Press. All Rights Reserved.)