Two U.S. soldiers have been killed and two others injured since last weekend in two separate accidents related to the Team Spirit '91 training exercises involving a large number of U.S. and South Korean troops, military officials said Wednesday.

Killed were Army Spec. Phillip D. Wallace, 34, of Wilmington, Del., 2nd Infantry Division, and Air Force Capt. Robert W. Howlatt with the 19th Tactical Air Support Squadron at Osan Air Base, 30 miles south of Seoul. Howlatt's hometown and age were not available immediately.