This still image provided by City of Newark Public Safety shows two suspects wanted for arson in an apartment building in Newark, N.J. Police say two people dressed as ninjas broke into a New Jersey apartment building and set several fires. Newark police officials say the unidentified man and woman broke in through a second-floor apartment Police say the building's sprinkler system quickly doused the flames. No one was injured. (Newark Public Safety via AP)

This still image provided by City of Newark Public Safety shows two suspects wanted for arson in an apartment building in Newark, N.J. Police say two people dressed as ninjas broke into a New Jersey apartment building and set several fires. Newark police officials say the unidentified man and woman broke in through a second-floor apartment Police say the building's sprinkler system quickly doused the flames. No one was injured. (Newark Public Safety via AP)

NEWARK, N.J. (AP) — Police say two people dressed as ninjas broke into a New Jersey apartment building and set several fires.

Newark police officials say the unidentified man and woman broke in through a second-floor apartment. WNBC-TV reports (http://bit.ly/2eZIpGs ) that there is video showing the two exiting through a side entrance and running off down a hill.

Resident Melissa Ditonto says the alarm loudly alerted everyone to the fire and many people evacuated.

Police say the building’s sprinkler system quickly doused the flames. No one was injured.