The reported threat of a shooter at a Downtown Jersey City apartment building this morning was unfounded and is being investigated as a hoax, police said.

Jersey City responded to the threat at 10th and Erie streets, which was relayed by the Garfield Police Department, with a massive show of force that included marked cruisers and Emergency Services Unit vehicles.

The caller, who identified herself as a teenager, originally contacted Garfield Police using the computer-based Skype system and notified authorities that she had just shot her mother in an apartment at the Lincoln Towers, at 204 10th St. and added that she was still armed.

Port Authority police also responded to the area, which was closed off immediately when Jersey City police got word of the possible shooter soon after 11 a.m., police said.

The area was reopened at noon after investigators contacted building management and determined preliminarily that the actual tenant of the apartment, who was not at home, had no connection to the alleged threat, police said.

Officers from ESU entered the building and confirmed that the original report was false, authorities stated.

Editor's note: This story has been updated to reflect new information.