The White House said on Saturday there would be repercussions for U.S.-Pakistan relations unless Islamabad took action to detain and charge a newly freed Islamist accused of masterminding a 2008 assault in Mumbai, India.

A Pakistani court ordered the release on Wednesday of Hafiz Saeed, who was put under house arrest in January after years of living freely in Pakistan, one of the sore points in its fraying relationship with the United States. His freedom had also infuriated Pakistan's archfoe, India.

The White House on Saturday urged Pakistan to arrest Saeed, calling for him to be prosecuted over the Mumbai attack that killed 166 people, including Americans.