Authorities said at least two police officers were shot in a gun battle that happened Tuesday in a Jersey City neighborhood.
Two juvenile suspects, described as a male and a female, were shot and killed by officers. A third suspect, described as a black male wearing all black, remains at large.
SWAT teams and federal agents responded to the scene.
One of the officers who was shot was undercover and was hospitalized with an apparent shoulder injury.
Officials said all schools in the area were placed on lockdown as the incident ensued.
An investigation into the incident is ongoing.