Police are investigating the deaths of a man and woman whose bodies were found in a New Jersey home Monday as a double homicide, prosecutors said.

Police discovered the bodies of Feredis Venturo, 33, and his girlfriend, Maria Yolanda Cotejo-Munoz, 35, in Venturo's home on Sairs Avenue in Long Branch when they went looking for Cotejo-Munoz, who had been reported missing on Sunday, prosecutors said. Authorities declined to say who reported her missing.

It wasn't clear how the duo was killed, but investigators said they have ruled out murder-suicide and believe they were slain by a third person, prosecutors said. 

It wasn't known how long the victims had been dead before police arrived. 

A friend of Cotejo-Munoz told NBC 4 New York she cleaned for a living and moved to the United States from Chile. She also has a 4-year-old son, the friend said.

The home where Cotejo-Munoz and her boyfriend were found is blocks from expensive beachfront homes and a middle school and high school. 

Neighbor Susan Galicia told NBC 4 New York she was shocked such a gruesome crime could happen so close to her home.

"This is a quiet area," Galicia said. "You don't expect to see something like this right across the street from where you live."

Galicia said there are five apartments in the home where the bodies of Cotejo-Munoz and Venturo were found.