Two children -- ages 10 and 12 -- were among the four people found dead in a Fontana home Monday night, authorities said.

The bodies were discovered by a teenager, who reportedly has some relation to the deceased, at a home in the 7300 block of Palmetto Avenue, according to the Fontana Police Department and KABC-TV

"There is some amounts of blood in different areas of the house, yes. There's a couple of weapons that have been seen by our detectives just looking, but again, they haven't been able to search the house because they can't until they obtain the search warrant," Fontana police Sgt. Doug Imhof told KABC.

Neighbors told the news station that the children's mother and stepfather also live at the residence.

Fontana police could not immediately be reached early Tuesday for further details. 

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