New Jersey prosecutors said yesterday they have uncovered evidence that a teenager charged with firebombing two synagogues had also targeted a third Jewish institution.

Bergen County Prosecutor John Molinelli announced additional charges against 19-year-old Anthony Graziano, but declined to provide more specifics.

Graziano was arrested earlier this week, and has pleaded not guilty to nine counts of attempted murder as well as bias intimidation and arson charges for a Jan. 11 attack on a Rutherford synagogue and the Jan. 3 firebombing of a Paramus synagogue.

Graziano was arrested after authorities traced the materials in some of the bombs to a Walmart store and captured surveillance images of a man buying the materials.

The man was later identified by tipsters as Graziano, who apparently had spoken to others about the attacks.