A man bypassed a security checkpoint at Newark International Airport, prompting an hours-long lockdown of a terminal at one of the busiest US airports, federal officials said.
The New Jersey airport's Terminal C was cleared after the security breach at 5:20pm EST (2220 GMT) on Sunday, the Transportation Security Administration said. Flights were grounded during the lockdown.
"TSA immediately halted screening at Terminal C's security checkpoints and worked with law enforcement to pull airport surveillance tapes to identify the individual," agency spokeswoman Ann Davis said.
Passengers were allowed to begin boarding again about six hours later, the TSA said. Officials have not found the man who caused the alert. Major US airports have been at a heightened security since a botched attempt to blow up a Detroit-bound Northwest Airlines flight on Christmas Day by a Nigerian man.
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