Its list of 10 militants released Tuesday included names and supposed hometowns – all of them in Pakistan.
With the disclosure, India is continuing to ratchet up pressure on Pakistan, apparently hoping that strong evidence will compel the international community to take a hard line against its neighbor.
Officials within Pakistan, including President Asif Ali Zardari, had previously cast doubt on India's assertions that the terrorists who ran amok in Mumbai for three days last month were Pakistani. Tuesday's announcement, including photos of nine of the 10, is intended to prove Indian claims beyond cavil.
"There's no way you can raise [pressure] unless you prove these guys were from there," says Devesh Kapur of the Center for the Advanced Study of India at the University of Pennsylvania.
Chief police investigator Rakesh Maria did not explain how he uncovered the indentity of the attackers, though one of the militants survived and has been interrogated.
All the suspects were between 20 and 28 years old, Mr. Maria said, and hailed from the Pakistani heartland of Punjab. The poor, rural areas of Punjab are fertile recruiting ground for Lashkar-e-Taiba, the militant outfit linked to the attacks by US and Indian intelligence. Pakistan took the operational commander of Lashkar-e-Taiba into custody Sunday.