(CNN) — A “cruel hoax” sent Villanova University students sheltering into place on the first day of orientation after a false report of an active shooter, the school’s president said, prompting a massive response by local and federal law enforcement as they worked to secure the campus.

No injuries were reported and no weapons were found, Peter M. Donohue, the university’s president, said in a letter sent to the campus community and obtained by CNN.

The first campus alert went out around 4:35 p.m. ET, during an opening mass, which was set to be followed by a family picnic.

“ACTIVE SHOOTER on VU campus. Move to secure location. Lock/barricade doors. More info to follow,” read an alert on the campus website.

“Panic and terror ensued” after the report, Donohue said in the letter.

Police

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