The New York newspaper that printed a map with all of the names of residents who have handgun permits has hired armed security to patrol its headquarters.

The Journal News, which covers Rockland, Westchester, and Putnam Counties in New York, faced a backlash from readers after publishing the names of residents who had handgun permits registered to their names. The newspaper created an interactive map which showed permit owners' names and addresses, which they posted on Dec. 23, 2011, as part of their coverage of the Newtown, Conn., school shooting.

The Gannett-owned paper received a wave of angry comments in which readers published the names and addresses of reporters and editors at the paper.

Caryn McBride, the Rockland editor for the newspaper, filed a report with the Clarkstown police about the "negative correspondence" received by the newspaper in response to the map.

On Dec. 28, she reported that she received an email from an unknown sender who wrote that he "wondered what McBride would get in her mail now."

The email did not contain any specific threats, and did not constitute an offense, according to a Clarkstown police report obtained by ABC News.

The report also noted that RGA Investigations, a private security firm, had been hired by the paper to perform security services in the wake of the controversy.

The company's "employees are armed and will be on site during business hours through at least January 2, 2013," the report said.

No security problems have been reported at the newspaper's offices.

The Journal News did not return messages seeking comment. They previously released a statement to ABC News defending their decision to publish the map.

"We obtained the names and addresses of Westchester and Rockland residents who are licensed to own handguns through routine Freedom of Information law requests. We also requested information on the number and types of guns owned by permit holders, but officials in the county clerks offices in Westchester, Rockland and Putnam counties maintained that those specifics were not public record," the statement read.