Pakistan has detained the founder of an Islamist group blamed for the Mumbai attacks.
The United Nations Security Council on Wednesday added Hafiz Saeed, founder of Lashkar-e-Taiba, and charity Jamaat-ud-Dawa to a list of people and organisations linked to al Qaeda or the Taliban.
He is under house arrest for three months. Three of his associates were also listed, and will be subject to sanctions freezing assets and restricting travel.
Prime Minister Yousaf Raza Gilani told visiting US Deputy Secretary of State John Negroponte on Thursday that Pakistan would fulfil its "international obligations" after the U.N. sanctions.
Analysts and diplomats regard Jamaat-ud-Dawa as a front for Lashkar-e-Taiba, banned by the government in 2002 after it and another group were blamed for an attack on the Indian parliament.
Lashkar was founded in 1990 to fight Indian rule in Kashmir.
The attacks in Mumbai (Bombay) in November killed at least 170 people.