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David Goldman, Associated Press
Passengers leave a fire station as they board a shuttle taking them off the tarmac at Hartsfield-Jackson Atlanta International Airport where two airplanes were being searched after authorities received what they described as credible bomb threats, Saturday, Jan. 24, 2015, in Atlanta.

ATLANTA — An FBI agent says law officers are continuing to pursue a suspect after someone made bomb threats targeting two jets bound for Atlanta, prompting F-16 fighter jets to escort the planes.

Federal Bureau of Investigation Special Agent Stephen Emmett told The Associated Press on Sunday that the agency is continuing to pursue leads in an effort to locate the individual responsible for the threats.

No bombs were found in searches of both planes after they landed safely in Atlanta on Saturday.

Airport officials say the threats targeted Southwest Airlines Flight 2492, which arrived at Atlanta from Milwaukee, and Delta Air Lines Flight 1156, which arrived from Portland, Oregon.

Preston Schlachter, a spokesman for the North American Aerospace Defense Command, said the threats were posted on the social media network Twitter.