Police are investigating a piece of mail that may contain nerve gas after two customs inspectors were overcome by fumes in a Kennedy Airport postal facility Sunday morning, sources said.
The item tentatively tested positive for VX nerve gas, which can be used as a weapon of mass destruction. More testing is needed to determine if the mail really contains the deadly gas, a law enforcement source said.
The two postal inspectors quickly recovered after becoming ill about 9:30 a.m., the source said.
They did not appear to be suffering from exposure to any chemical weapon.
Port Authority police shut down the facility, where mail is inspected after arriving from overseas, and were continuing to investigate Sunday afternoon.
The FBI is also on scene, sources said.
ttracy@nydailynews.com
