A terrorist group called for its backers to attack NJ Transit police officers when it released personal data of 55 cops.

The information includes the officers' names, home addresses, phone numbers and ranks, Newsweek.com said.

The information was available in tweets sent out in early March by the Caliphate Cyber Army (CCA), formerly known as the Islamic Cyber Army.

Twitter suspended the account before the list was referenced in another tweet sent Monday, according to NBCNewYork.

NJ Transit's computer system was not compromised, spokeswoman Jennifer Nelson said. "Some information was breached from an outside vendor," she said.

The 39-page list includes past and present officers, Patch.com said. It was obtained February 26 from a uniform laundering list, DailyMail.com reported.

In addition to NJ Transit police, the FBI and the Department of Homeland Security are investigating the threats, which officials don't consider credible.

NJ Transit Local PBA 304 released a statement in its Facebook page denouncing the threats.

"While our Local continues to work with Federal agencies to help locate those responsible for such vile comments, we as a group will not let these cowardly acts deter us from maintaining a safe environment within the third largest transportation system in the country," the statement released on Monday said. "We will not let this deter us from securing what is considered a major target to groups looking to do harm to the citizens of our great country."

NJ Advance Media reporter Larry Higgs contributed to this report.

Jeff Goldman may be reached at jeff_goldman@njadvancemedia.com. Follow him on Twitter @JeffSGoldman. Find NJ.com on Facebook.