Police in Pakistan say they have detained several people in connection with the kidnapping of an American development expert in Lahore.
Between six to eight assailants are said to have seized the man, named by the U.S. State Department as Warren Weinstein, after breaking into his house and overpowering security guards early in the morning of August 13.
Lahore police chief Ahmed Raza Tahir said those held for questioning include guards posted at the house.
He said police hoped to recover Weinstein soon. No-one has claimed responsibility for the kidnapping.
Weinstein, who is in his 60s, has been identified as working for J.E. Austin & Associates, an Arlington, Virginia-based consulting firm, on a development project in lawless tribal areas where Pakistani troops have been battling Islamist insurgents for years.