Seattle bomb threat outside FBI headquarters is false alarm; 1 in custody

One man is in custody after lighting the tire of his truck on fire outside the FBI headquarters in Seattle and falsely telling authorities there was a bomb inside his vehicle, a spokesman for the FBI said Saturday. 

Seattle police brought out their bomb-defusing robot to inspect the scene but there was no bomb in the truck, KIRO reports. 

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There is no longer any threat in the area, the FBI said. 

The FBI warned in a recent internal bulletin that there is a substantial threat of explosive devices to law enforcement during upcoming protests, ABC News reports.