A Holmdel elementary school was evacuated following what appears to be a a false report of an armed intruder on the school's roof.

Police respond to reports of an intruder at the Village Elementary School in Holmdel (7 ABC)

A call was received at the Village Elementary School  just before 11 a.m. on Tuesday morning prompting a lockdown to be put in place and a response from law enforcement from across the county according to a statement from the Monmouth County Prosecutor's Office.

The Monmouth County Emergency Response Team (MOCERT)'s  room-by-room check  of the school on McCampbell Road turned up no intruder, according to acting Monmouth County Prosecutor Christopher J. Gramiccioni, for what appears to be a hoax.

“We will always view a threat of violence against our young students as a serious threat. A dozen law enforcement agencies responded in full force today to ensure that safety but it turned out to be nothing more than a hoax – a very costly hoax – and thankfully no one was hurt,” Gramiccioni said in a statement.

ABC 7 reports armed police officers were searching on the school's roof while K9 dogs were on the ground. Video footage from Fox 5 New York showed students walking single file away from the school.

Holmdel Mayor Hinds tells NJ.com that students were loaded onto buses which later returned them to the school. Hinds says other schools in the Holmdel school district were not place on lockdown but security was stepped up.

Anxious parents outside the Village Elementary School in Holmdel (Monmouth County Prosecutor's Office)

Village School principal Brian Schillaci wrote in a Facebook post later on Tuesday that all students are "safe and sound in the building" and stressed the importance of letting students return to their ""normal, settled, safe environment" with all afternoon activities going on as scheduled. He praised students and staff for the "spectacular" job they did in implementing what they have gone over in practice drills. All students were dismissed at the regular time, 3:35 p.m. according to Gramiccioni.

Prosecutor's spokesman Charles Webster says that it's "possible" this could be another case of swatting, the practice of making a phony report for the "thrill" of watching the response. A Connecticut man was charged with swatting Allentown High School in Upper Freehold and St. John Vianney in Holmdel in January, 2014.