Bagram, Afghanistan ? Two American soldiers who were seriously wounded in an ambush in eastern Afghanistan have been evacuated to Germany for medical treatment, a military spokesman said Sunday.

Col. Roger King, spokesman at Bagram, the main U.S. base in Afghanistan, said one soldier had very serious head injuries and was sent from the hospital at he U.S. base in Landstuhl, Germany, to a hospital in Hamburg. The other soldier was in stable condition at Landstuhl with eye injuries, King said.

Three other U.S. soldiers injured in Saturday’s attack were in stable condition at Bagram’s hospital with fragmentation wounds to the extremities. King said two were expected to return to duty within a week. The other may be sent to Germany for further treatment.

One wounded attacker was captured by U.S. troops and is being treated at Bagram. He is in very serious condition, King said.

The troops came under attack from small arms while on a reconnaissance mission in the Khost region, about 150 kilometers (90 miles) southeast of Kabul. Two allied Afghan fighters and four attackers were killed in the 4.5-hour battle.

U.S. coalition forces continue to conduct operations searching out Taliban and al-Qaida fighters believed to be hiding in the region bordering Pakistan.