Pakistani security forces have arrested three people from an Islamic charity closely linked to the group India accuses of involvement in the Mumbai attacks, an intelligence official said Monday. The arrests took place Sunday as international pressure mounted on Pakistan to take action against the banned Islamic group Lashkar-e-Taiba, seen as the prime suspect in the devastating Mumbai siege. "Three people were rounded up in a brief operation against the Islamic charity Jamaat-ud-Dawa," the official said. "The raid was carried out to get details about the activities of the group in Kashmir in the wake of allegations by India that LeT (Lashkar-e-Taiba) was using Pakistani territory for training." The three were arrested at the charity's offices outside the capital of Pakistani-administered Kashmir, Muzaffarabad, where Lashkar-e-Taiba is active. They were members of the local branch of the charity, the official said. Jamaat-ud-Dawa is run by Hafiz Saeed, who founded Lashkar-e-Taiba in 1989. He abandoned the group when it was banned after India alleged it was behind an attack on parliament in New Delhi. Senior government officials refused to confirm or deny the arrests, which came as US Secretary of State Condoleezza Rice on Sunday urged Pakistan to act quickly.