KABUL, Afghanistan -- U.S. and Afghan military forces rescued an American doctor who had been kidnapped by the Taliban in eastern Afghanistan, military authorities said Sunday. Officials in Washington later confirmed that one of the rescuers was killed in the operation.

The kidnapped doctor, identified as Dilip Joseph, a U.S. citizen working for a nonprofit group based in Colorado, was rescued along with two Afghan doctors and an Afghan driver, according to international forces and Afghan officials.

The doctors and driver were abducted by gunmen Wednesday afternoon after they visited a rural clinic in the village of Jad Dalak in the Sorobi district of Kabul province, east of the capital, said Hazrat Mohammed Haqbin, the district governor.

The captives were moved to the Qarghaee district of neighboring Laghman province, according to Sayed Jan, health director of the Sorobi district. The kidnappers demanded $100,000 for the captives' safe return, Jan said

Naqibullah Khan, the Sorobi chief of police, said U.S. special operations forces and Afghan police and military launched a rescue operation after receiving information that the captives were likely to be harmed. Afghan police managed to capture the insurgents' commander, Shah Gul, who told them the captives' location, according to Jan.

During the operation, American and Afghan forces killed six insurgents and detained two kidnappers in addition to Gul, Jan said.

Joseph is a medical adviser for Morning Star Development in Colorado Springs, Colo., according to Sorobi health officials. A statement from the International Security Assistance Force said Joseph was undergoing a medical evaluation Sunday.

The Sorobi district lies along the main paved highway linking Kabul to the eastern city of Jalalabad. The road is considered relatively safe, at least during daylight hours. It is patrolled by Afghan police and soldiers, with checkpoints set up at regular intervals.

In a statement issued by the White House press office, President Barack Obama praised "our special operators in Afghanistan (who) rescued an American citizen ... in a mission that was characteristic of the extraordinary courage, skill and patriotism that our troops show every day."