Pakistani police say the men were detained during a raid on the home of a local leader of the banned militant group Jaish-e-Muhammad, in Pakistan's Punjab province.

VOA: standard.2009.12.11

Gilani would not confirm the detention of Masood Azhar, the leader of another militant group, Jaish-e-Muhammad.

CNN: Pakistan PM confirms Mumbai arrests

That attack, by car bomb as well as gunmen, looked like the work of Pakistan-based insurgents: one such group, Jaish-e-Muhammad, took responsibility for it, but later retracted the claim.

ECONOMIST: Were Pakistanis involved?

And though Pakistan's army has faced down the home-grown Taliban in the North-West Frontier Province and the tribal areas, Pakistan's heartland continues to be plagued by their extremist fellows, such as Jaish-e-Muhammad and Lashkar-e-Taiba.

ECONOMIST: Pakistan wants a say in ending the war, and it knows how to ask