Pakistan said today security forces had closed five training camps run by Lashkar-e-Taiba, the group blamed for the Mumbai attack, and arrested 124 of its leaders and those of a related charity.
Tension between Pakistan and India has been simmering since the late November attack in which gunmen killed 179 people in Mumbai, India's financial capital.
India has become increasingly frustrated with what it sees as Pakistan's lack of action in response. Pakistan has been angered by an Indian suggestion Pakistani state agencies were involved and what it sees as repeated Indian hints of military action.
Pakistan condemned the attack, denied involvement of any of its agencies and offered cooperation to India in the investigation.
Pakistan's top interior ministry official, Rehman Malik, repeated that offer today as he outlined action the government had taken against the LeT and an Islamic charity the United Nations says is an LeT front.
"We have arrested a total (of) 124," Mr Malik told a news conference, adding those arrested were "mid-level, lower-mid-level and their top leadership".
Lashkar-e-Taiba (LeT) was banned in Pakistan in 2002 but the United Nations says it has been using its charity wing, the Jamaat-ud-Dawa (JuD), as a front for its militant activities.
JuD was added to a UN list of terrorist organisations days after the Mumbai attacks. Hafiz Saeed, founder of LeT and head of JuD, was put under house arrest soon after that.
British foreign secretary David Miliband, who has been in India and is due to visit Pakistan, said Pakistan had to prosecute those responsible for the attacks. "We should hold the Pakistan government to the promise that these people will be put through the judicial system and, if found guilty, will be prosecuted. That's only a first step," Mr Miliband said in a speech at the Taj Mahal hotel in Mumbai, one of the places the gunmen raided in November.
