Port Authority police have shut down an American Airlines terminal at John F. Kennedy Airport as they investigate a suspicious bag.
A law enforcement source said the bag was left by a man who was screened and boarded a flight to San Francisco. He left the bag in the business class lounge, the source said.
The Transportation Security Administration says a bomb-sniffing dog conducting routine screening gave an alert about the bag, so a bomb squad is checking it out.
Authorities have closed the check-in desk, the screening checkpoint and the roadway to the terminal, as a precaution.
This story is developing. Check back for updates.
