65_HS1-834228961_62-HQ-83894_Section_006

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FEDERAL BUREAU OF INVESTIGATION
.S. DEPARTMENT OF JUSTICE
COMMUNICATIONS SECTION

OCT 13 1950

TELETYPE

SAC, KNOXVILLE

10-13-50

8-26 PM

JYC

DIRECTOR, FBI

U R G E N T

X RADAR DETECTION OF UNIDENTIFIED OBJECTS OVER OAK RIDGE OCTOBER TWELVE, WINETEEN FIFTY, PROTECTION OF VITAL INSTALLATIONS. USAF RADAR INSTALLATION AT KNOXVILLE AT ELEVEN TWENTYFIVE PM, EST, OCTOBER TWELVE, PICKED UP INDICATIONS OF ELEVEN OBJECTS AND PERHAPS MORE TRAVELING ACROSS CONTROLLED AREA OF ATOMIC ENERGY INSTALLATION AT OAK RIDGE. ALTITUDE OF OBJECTS VARIED FROM ONE THOUSAND TO FIVE THOUSAND FEET, COURSES FROM SOUTH SOUTH EAST TO SOUTHEAST, AND DENSITY FROM READING MADE BY LIGHT AIRCRAFT TO AIRCRAFT EQUAL IN SIZE TO C FORTY SEVEN, SPEED FROM ONE HUNDRED TO ONE HUNDRED TWENTYFIVE MILES PER HOUR. FIGHTER PLANE ATTEMPTED TO INTERCEPT IN FEW MINUTES AND RADAR SCREEN REFLECTED CONTACT, BUT PLANE REPORTED NO OBJECT COULD BE SEEN EITHER VISUALLY OR ON PLANES RADAR SCREEN. AEC PATROL WAS ALERTED BUT NO OBJECTS COULD BE VISUALLY SIGHTED BY THEM OVER THE AREA OTHER THAN THE AIR FORCE INTERCEPTOR. OSI AND EASTERN AIR DEFENSE FORCES HAVE BEEN ADVISED AND ARE CHECKING INCIDENT. NO REASONABLE EXPLANATION FOR RADAR READINGS YET DEVELOPED ALTHOUGH OPERATORS ARE EXPERIENCED RELIABLE PERSONNEL AND RADAR SET IS IN PERFECT OPERATING CONDITION. BUREAU WILL BE ADVISED OF FURTHER DEVELOPMENTS.

ROBEY

ACK AND HOLD PLS

8-31 PM OK FBI WASH DC GAR

55 DEC 7 1950

INDEXED - 15

62-83894-261

NOT RECORDED
SE 1950 NOV 22

INITIALS ON ORIGIN