Remains of a woman were found at two sewage treatment plants about 30 miles apart, the Los Angeles County Sheriff\'s Department said. Sheriff\'s detectives said they believe the upper torso found Monday in a San Gabriel Valley water treatment plant belongs with a pelvis and legs discovered Saturday at the other facility, the Los Angeles Times reported. Detectives are treating the woman\'s death as a homicide, sheriff\'s Lt. Mike Rosson said. Authorities said they believe the body entered the sanitation system somewhere in the San Gabriel Valley. Investigators recovered more body parts Monday and were trying to find a missing arm, the Times said. \"Anything that comes into the Los Angeles water plant must move through a 17-inch line before going through a central pump, Rosson said. \"So you imagine what kind of damage to a person\'s body would happen.\" Craig Harvey, chief of the coroner\'s office, said his office would examine the remains and \"use DNA if necessary to see if they are connected.\" A spokesman for the Sanitation Districts of Los Angeles County said the two plants are interconnected.