Associated Press

JERSEY CITY – Jersey City's mayor says a police officer who posted information online about an alleged threat to police by gang members will face department discipline.

News of the threat comes in the wake of a shootout Sunday that killed a 23-year-old rookie officer. Police shot and killed assailant Lawrence Campbell.

Mayor Steven Fulop confirmed the city's police department issued a notice that an informant spoke of Bloods gang members targeting police for retaliation. Fulop said threats frequently crop up after police shootings and are rarely credible.

Police say Campbell stole a security guard's gun and waited for officers to arrive before opening fire on Officer Melvin Santiago. Campbell was shot and killed when officers returned fire.