At least five students were led from the Essex Valley School in West Caldwell after the school was put on lockdown after reports that a student was seen with a gun.

Essex Valley School in West Caldwell (Google street view)

ABC 7 reports the school was placed on lockdown around  noon and every student led out of the school one-by-one to find the weapon as police with K-9 units went on a room-to-room search.

West Caldwell Police in a statement said five students were detained and released according to The Alternative Press. Charges are pending against the five

No weapon was found according to CBS New York.

West Caldwell Police sent an alert about a police investigation an hour later and said no other schools or businesses were affected. Police Chief Michael Bramhall said the lockdown procedure is precautionary.

The school, which describes itself as providing a "therapeutic and academic environment" for troubled students from north Jersey school districts, is not far from the Fairfield location of Gov. Chris Christie's town hall forum Wednesday.

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The Associated Press contributed to this report