A paperweight that looked just like a grenade set off a massive evacuation at JFK Airport yesterday.

Hundreds of people were forced to leave Terminal 4 after the faux explosive was found in luggage at 4:20 p.m.

The paperweight belonged to a passenger on a Transaero Airlines flight that had just come in from Moscow, authorities said. He told authorities that he received it as a gift while doing volunteer work with the Israeli army.