Plane Hits Barracks ng Six Navy MenSAN DIEGO, Feb. 18 (U.E)—A four-motored Navy bomber crashed into a barracks 10 miles south of here early today, killing six Navy mbn and injuring 30, Coronado police reported.The huge plane burst into flame and sent sheets of fiye billowing skyward. Residents of widely separated areas of San Diego reportedseeing the leaping flames.City fire equipment and ambulances were rushed to the scene» onrestricted territory. Ferry servicePoles Agree To Discuss BoundariesLONDON, Feb. 18 lt;U.P)—ThePolish government-in-exile has informed the British government that it is willing tq negotiate withbetween San Diego and Coronado was suspended a half hour while emergency equipment was hurried across.Injured were taken to a Naval hospital and the dead to a private mortuary. Neither was permitted to discuss the crash nor confirm the presence of victims.Naval officials refused any comment on the crash, but promised(Continued on Page 7, Column 1]