A machete-wielding maniac was shot and killed in a chaotic confrontation with police at a New Jersey home Monday night — before cops discovered three dead victims inside the residence, according to authorities and reports.

Cops responded to a home on River Road in Piscataway around 5:30 p.m. after receiving a 911 call about an individual who had a knife, the Middlesex County Prosecutor’s Office told WABC.

Police tape blocking a house in Piscataway, New Jersey.
Police tape blocks a house next to 831 River Road in Piscataway, N.J. after a machete-wielding man was shot and killed in a confrontation with police.Luiz C. Ribeiro for New York Post
Piscataway police detectives at a crime scene with caution tape.
The machete-wielding suspect continued to move toward officers with his weapon and was eventually shot and killed by police.Kyle Mazza/UNF News/Shutterstock

When police arrived, an unidentified man charged at them with a large blade, a law enforcement source told the outlet.

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The blade he was carrying was specifically identified as a machete, sources told Fox 5.

Officers deployed their Tasers in response to the suspect’s approach, but were unable to stop him, according to WABC.

A Piscataway Police Department patrol car is parked outside a home at 831 River Road in Piscataway, N.J., where three people were found dead.
After the fatal shooting, cops discovered three additional unidentified people dead inside the home.Luiz C. Ribeiro for New York Post
Piscataway Mayor Brian C. Wahler speaks to the media with microphones from Pix11, NBC4, News12, CBS2, and ABC7 visible.
Piscataway Mayor Brian C. Wahler speaks to the media outside the home.Luiz C. Ribeiro for New York Post

The machete-wielding man continued to move toward officers with his weapon and was eventually shot and killed by police.

After the fatal shooting, cops discovered three unidentified people dead inside the home, authorities said.

Police vehicles and an ambulance at a crime scene in Piscataway, New Jersey.
Two grandparents were among the dead.Kyle Mazza/UNF News/Shutterstock

Two grandparents were among the dead, a source told the outlet. It’s unclear who the remaining victim is or the relationship between the slain suspect and the three victims.

The cause of the three individuals’ deaths is not immediately clear.

The Middlesex County Prosecutor’s Office did not immediately respond to The Post’s request for comment late Monday.

The incident appears isolated, and there is no ongoing danger to the surrounding community, the Piscataway Township Police Department posted on Facebook.

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“We are aware of the horrific crime in Middlesex County tonight. All our members that were involved are being evaluated. Thank you to all who have reached [out] to offer support,” New Jersey State PBA president Peter Andreyev said in a statement.

The Middlesex County Prosecutor’s Office and the New Jersey Attorney General’s Office will investigate the deadly incident.