Updated Nov. 22 at 12 p.m.

Police searched the West Orange Public Library Monday night after an employee received a call that a man was inside the restroom with an explosive device.

However, after a search of the library, with fire and EMS personnel waiting outside, the threat was determined to be false, according to library director Renee Riczker.

She said a library employee received a call around 7:15 p.m. from an unknown person claiming there was a bomb in the library.

Library employee Rosemary Opondo picked up the call. "The person say: the person going to the men's bathroom has a bomb. Not kidding," she told Patch. She said she could not remember whether she heard a man or a woman on the phone.

"I myself was too scared," said Opondo, an Orange resident.

West Orange Police Chief James Abbott said consecutive calls were made to the library by an unknown voice. He said whoever is responsible could face charges including causing false public alarm and making terroristic threats.

Faith Boyle, head of youth services at the library, said the police officer who serves as the library security guard searched the men's restroom and found two people inside. One man walked out and sat down by the computers, another was a young man carrying a backpack. The teenager let the officer check his backpack but nothing was found, said Boyle.

She said four more police officers arrived to search the area but found nothing.

The library remained open as police thoroughly searched the area. About a dozen residents were still at the library perusing through books and on the computers when reporters arrived on scene shortly after 8 p.m. The library closes at 9 p.m. Mondays.

Abbott said the building was not evacuated per the decision of Boyle who was in charge of the building that night. He said whoever is in charge of the building makes the decision as to whether to evacuate the area.

"The way it was on the phone it didn't have that threatening feeling ... but we wanted to make sure to cover all our bases," Boyle said.

She said she answered the second call where a voice simply said "bomb" and hung up the phone. She said the voice sounded like a woman and that the call sounded like it was made from a cell phone because the reception was not clear.

Abbott said there are no suspects at this time and that the likelihood of catching someone was "slim to none."

He said, though, false bomb threats are not new to the municipality. "You typically see it the most at schools in May and June to upset exams at school and as pranks."