Police were investigating the discovery of four bodies -- two adults and two children -- in a home in Fontana, Calif., officials said Tuesday. Police said they found the bodies inside the home Monday after receiving a call from a 16-year-old male who told officers his family had been injured or possibly killed in the house, KNBC-TV, Los Angeles, reported. "We located four bodies; two children, a female about 12 years old, a male about 10 years old, a female victim adult 35 to 40 [years old] and a male about the same age," Fontana Police Sgt. Doug Imhof said. "It appears as though they all lived there." Family members at the scene said the four bodies were members of one family, KNBC said. Imhof said officers found blood in different areas of the house, along with "a couple of weapons," KABC-TV, Los Angeles, reported. Neighbors told reporters arguing had been heard coming from the house earlier.