Despite pledges from Pakistan to dismantle militant groups operating on its soil, and the arrest of a handful of operatives, Lashkar has persisted, even flourished, since 10 recruits killed 163 people in a rampage through Mumbai, India’s financial capital, last November…

Indeed, Lashkar’s broader network endures, and can be mobilized quickly for elaborate attacks with relatively few resources, according to a dozen current and former Lashkar militants and intelligence officials from the United States, Europe, India and Pakistan…

[A] senior American intelligence official said the ISI was believed to maintain ties with Lashkar. Four Lashkar members, interviewed individually, said only a thin distance separated Lashkar and the ISI, bridged by former ISI and military officials…

Even as new details emerge about the Mumbai attacks, senior American military, intelligence and counterterrorism officials express grim certainty that Lashkar is plotting new attacks.

The United States warned Indian officials this year about a Mumbai-style attack by Lashkar against multiple sites in India, according to a senior Defense Department official and a senior American counterterrorism official.