Gunmen claiming to be Islamic militants shot and wounded an American woman in the Pakistani port city of Karachi on April 16, leaving leaflets that named her and said she was targeted because she was from the United States.
Debra Lobo, vice principal at a dental college in Karachi, was shot in the face and hand by gunmen on motorcycles while driving home from her office.
Lobo, who is married to a Pakistani man, was at a Karachi hospital on April 17.
They left English-language leaflets claiming to be members of a Pakistani Taliban faction from Balochistan Province called Dualat al Islamia, which declared allegiance to Islamic State militants in 2014.
Police said they could not confirm the attackers were Islamic militants.
The leaflets threated more attacks against U.S. citizens.
An Urdu version of the leaflet did not contain references to any known Islamist militant group.
With reporting by AP, AFP, and Dawn