Ten hostages are safe after a tense 15-hour standoff at a downtown Bakersfield bank ended early Wednesday with the death of the suspect, authorities said.
Homeland Security said investigators arrested an Afghan national who allegedly made a social media post about "building a bomb" and threatened to blow up a building in Fort Worth, Texas.
All flights at Reagan National Airport were halted for some time on Tuesday due to a bomb threat on a flight from Houston, federal authorities said.
It was not immediately clear whether the subject of the arrest, a juvenile, was responsible for threats made against other locations as well.
Police gave the all-clear after the threat was reported around 6 p.m. Friday.
Oktoberfest resumed Wednesday afternoon following a search of the grounds involving explosive detection dogs, authorities noted.