Military officials say four bombers and a refueling plane involved . NORAD intercepts Russian bombers in the defense zone about 10 times a year , Davis said , though usually not near California . They first flew near Alaska and then two were seen within 50 miles of California . The planes are believed to have been flying at an altitude of about 10,000 feet, which is the same as most commercial airliners. The Russian planes were intercepted by U.S. fighter jets .
Military officials say four bombers and a refueling plane involved . They first flew near Alaska and then two were seen within 50 miles of California . The planes are believed to have been flying at an altitude of about 10,000 feet, which is the same as most commercial airliners. The Russian planes were intercepted by U.S. fighter jets .