Crews responded to heavy fire coming from a house at 15 Willow Brook Road near Route 34 in Colts Neck around 1:30 p.m.
If anybody has any information, encourage Colts Neck police at 732-780-7323 or the Monmouth County Prosecutor's Office at 732-431-7160. The bodies of the other adult and two children were found badly burned inside, and the medical examiner's office is now working to identify them, police added.
A tech company CEO, his wife, and their two young children have been found dead at the scene of an "intentional" mansion fire in an affluent New Jersey neighborhood.
Gramiccioni said he's heard reports that five people have possibly died in the fire, but clarified investigators "know of four, and four alone".
The home is owned by Keith Caneiro, 50, and Jennifer Caneiro, 45, according to various public records.
Dramatic footage from the scene showed thick black smoke billowing from the huge mansion as firefighters worked to contain the blaze. Police are investigating if the fires are connected.
"It's important to emphasize that we have no reason to believe that anyone in the community is in any danger at this time", he said.
Chris Watts sentenced to life for murders of pregnant wife, daughters
Watts will have an opportunity to make a statement during the hearing Monday in Weld County, but it's not clear if he will speak. The prosecutor in the case says authorities have a partial motive and will offer more details after sentencing .
Sources also confirmed that a second fire occurred at the home of the brother of one of the mansion's residents in Ocean Township.
'That remains to be seen but that is an angle we continue to pursue, ' said Gramiccioni.
According to real estate website Zillow, the 5,784-square-foot house in Colts Neck was built in 2003.
It is now unclear whether those victims were also shot dead, or died in the subsequent blaze, NBC10 reported.
Colts Neck is a well-to-do community about 50 miles (80 kilometers) south of New York City and is home to horse farms.
Caneiro and Paul were partners in Square One. One firefighter was injured but is expected to make a full recovery.