Warren Weinstein, a development expert who had lived in Lahore since 2006 and learned Urdu, was snatched in the eastern Pakistani city on Aug. 13, 2011. He later appeared in a video in which, under apparent coercion, he asked the United States to free al-Qaida prisoners.
US officials "strongly condemn kidnappings of any kind, call for the immediate release of the victim and the prosecution of those responsible," State Department spokeswoman Marie Harf told reporters on Aug. 13.
Harf said she had no update on Weinstein's condition. The United States has previously ruled out negotiating for the hostage's freedom.
His family has voiced fear for the health of Weinstein, whose 73rd birthday was last month, saying he suffered from asthma, heart problems and high blood pressure.
By Ruchi Singh