Oscar C. Anderson, 70, a retired lieutenant in the Defense Department police who was stationed at the Defense Communications Agency in Arlington, died at the Daytona Beach (Fla.) Community Hospital Wednesday following a heart attack.

Before joining the Defense Department police in 1962, Mr. Anderson served for 22 years in the Army, from which he retired as a master sergeant.

He was a veteran of World War II, in which he served in Europe and earned the Bronze Star and Purple Heart, and of the Korean conflict. His last Army assignment before retiring in 1962 was with the U.S. military advisory group in Korea.

Mr. Anderson retired from the Defense Department police in 1977. In 1978, he moved from his home in Arlington to Port Orange, Fla.

He was born in Cresco, Iowa and lived there until joining the Army in 1940.

He was a member of the National Rifle Association, the American Legion, the Veterans of Foreign Wars, the Sons of Norway and the National Association of Uniformed Services.

Survivors include his wife, Irene Doris Anderson of Port Orange; a daughter, Teri Elaine Williams of Prince George, Va.; two brothers, Lester N., of Waterloo, Iowa, and Palmer B., of Floyd, Iowa; a sister, Laura Dybvik of Harmony, Minn., and three grandchildren.