Police found two adults and a juvenile dead at the scene.&nbsp;

A second juvenile was rushed to Newark University Hospital in critical condition, the department said.

<a href="https://www.foxnews.com/us/three-teens-1-man-dead-apparent-murder-suicide-texas-home" target="_blank"><strong>THREE TEENS, 1 MAN DEAD IN APPARENT MURDER-SUICIDE IN TEXAS HOME</strong></a>

<div class="m"><picture><source media="(max-width: 767px)" srcset="https://a57.foxnews.com/static.foxnews.com/foxnews.com/content/uploads/2023/02/343/192/MURDER-SUICIDE-NJ-SCENE-WNYWEME001_mxf_00.00.57.52.jpg?ve=1&amp;tl=1, https://a57.foxnews.com/static.foxnews.com/foxnews.com/content/uploads/2023/02/686/384/MURDER-SUICIDE-NJ-SCENE-WNYWEME001_mxf_00.00.57.52.jpg?ve=1&amp;tl=1 2x"><source media="(min-width: 767px) and (max-width: 1023px)" srcset="https://a57.foxnews.com/static.foxnews.com/foxnews.com/content/uploads/2023/02/672/378/MURDER-SUICIDE-NJ-SCENE-WNYWEME001_mxf_00.00.57.52.jpg?ve=1&amp;tl=1, https://a57.foxnews.com/static.foxnews.com/foxnews.com/content/uploads/2023/02/1344/756/MURDER-SUICIDE-NJ-SCENE-WNYWEME001_mxf_00.00.57.52.jpg?ve=1&amp;tl=1 2x"><source media="(min-width: 1024px) and (max-width: 1279px)" srcset="https://a57.foxnews.com/static.foxnews.com/foxnews.com/content/uploads/2023/02/931/523/MURDER-SUICIDE-NJ-SCENE-WNYWEME001_mxf_00.00.57.52.jpg?ve=1&amp;tl=1, https://a57.foxnews.com/static.foxnews.com/foxnews.com/content/uploads/2023/02/1862/1046/MURDER-SUICIDE-NJ-SCENE-WNYWEME001_mxf_00.00.57.52.jpg?ve=1&amp;tl=1 2x"><source media="(min-width: 1280px)" srcset="https://a57.foxnews.com/static.foxnews.com/foxnews.com/content/uploads/2023/02/720/405/MURDER-SUICIDE-NJ-SCENE-WNYWEME001_mxf_00.00.57.52.jpg?ve=1&amp;tl=1, https://a57.foxnews.com/static.foxnews.com/foxnews.com/content/uploads/2023/02/1440/810/MURDER-SUICIDE-NJ-SCENE-WNYWEME001_mxf_00.00.57.52.jpg?ve=1&amp;tl=1 2x"> <img src="https://a57.foxnews.com/static.foxnews.com/foxnews.com/content/uploads/2023/02/640/320/MURDER-SUICIDE-NJ-SCENE-WNYWEME001_mxf_00.00.57.52.jpg?ve=1&amp;tl=1" alt="Police said the gunman is believed to be among those found dead." width="100%" height="auto"></picture></div> <div class="info"><div class="caption"><p><span>Police said the gunman is believed to be among those found dead.</span> <span>(FOX5 New York WNYW)</span></p></div></div>

Investigators said the shooter is believed to be among those found dead but did not elaborate. The relationship between the victims was unclear.

Police said there was <a href="https://www.foxnews.com/category/us/crime" target="_blank">no further threat</a> to the public.

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No additional details were immediately available.

Police in Linden, New Jersey, said two adults and a juvenile were killed in a shooting Sunday morning, and that the gunman is believed to be among those found dead.

NJ shooting leaves 3 dead, including juvenile; gunman believed among dead found in home, police say

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