Investigators from the FBI/NYPD Joint Terrorism Task Force and the NYPD Counterterrorism and Intelligence Bureau, in collaboration with law enforcement partners, uncovered what she called “a developing threat to the Jewish community” on Friday.Christopher Brown, 21, from Aquebogue, New York, is being charged with making a terroristic threat, aggravated harassment, and criminal possession of a weapon.After being alerted to the online messages, FBI agents from the Joint Terrorism Task Force and detectives from the NYPD’s intelligence bureau began what was a source described as “frantic efforts” to identify and locate the suspects.Sources said the backpack was recovered with a Glock semi-automatic firearm, a ghost gun with an extended 30 round magazine and laser sight.“This morning’s arrests in Penn Station and weapon seizures are proof of their vigilance & collaboration that keeps New Yorkers safe.”Jewish communities receive threatsThis latest threat of violence against synagogues comes more than a week after a New Jersey man was arrested after being accused of making threats to attack a synagogue and Jewish people."