New York City ? The FBI arrested four men Wednesday in what authorities called a plot to detonate a bomb outside a Jewish temple and to shoot military planes with guided missiles.

Officials told The Associated Press the arrests came after a long-running undercover operation that began in Newburgh, N.Y., about 70 miles north of New York City.

James Cromitie, David Williams, Onta Williams and Laguerre Payen, all of Newburgh, were charged with conspiracy to use weapons of mass destruction within the United States and conspiracy to acquire and use anti-aircraft missiles, the U.S. attorney’s office said.

The men had planned to detonate a car with plastic explosives outside a temple in the Bronx neighborhood of Riverdale and to shoot military planes at the New York Air National Guard base at Stewart Airport in Newburgh with Stinger surface-to-air guided missiles, authorities said.

In their efforts to acquire weapons, the defendants dealt with an informant acting under law enforcement supervision, authorities said. The FBI and other agencies monitored the men and provided an inactive missile and inert C-4 to the informant for the defendants, a federal complaint said.