Police said they still have no suspects or persons of interests in the murder of 6-year-old Sierra Newbold, whose body was discovered Tuesday in a West Jordan, Utah canal.

Our investigators were up at the Medical Examiner's Office and they conducted an autopsy this morning, Sgt. Drew Sanders said,  according to Fox 13. We just barely received word that this has been officially ruled a homicide. They also found evidence of a sexual assault.

Sierra was reported missing at 7:45 a.m. Neighbors and police canvassed the girl's neighborhood until a West Jordan police officer found her body in a canal about an hour later.

There's obviously a predator out there, West Jordan Police Chief Doug Dia­mond said in the Salt Lake News Tribune. Unfortunately, we have people out there who are monsters.

Diamond said that no one had been ruled out as a suspect, including the girl's family members; however, he said the family is continuing to cooperate with the investigation.

Our highest priority now is to identify, arrest, and successfully prosecute the person or persons responsible for this crime, said Diamond, according to the Daily Mail. I share in the concern of our residents for the ongoing safety and security of our children.

Diamond said there was no reason for people to panic, but urged residents to take precautions and keep an eye out on their children. He hopes members of the community will remain aware of their surroundings and come forward with any information they might have.

Right now we don't know if it's an isolated incident or not, Diamond said in the Salt Lake Tribune. If, during the course of this investigation, [we determine] an imminent threat to our community, we'll let you know immediately.

Niether Diamond nor Sanders commented on any motive regarding the girl's murder.

We haven't come to any conclusion, Sanders said, according to the Associated Press. He said police have tons of leads, adding it's paramount we find out who did this.

Police said there are no signs of a break-in at the family's home.

We don't have any idea how Sierra disappeared or whether she was taken from the bedroom, her grandfather, Reed Newbold, told the AP. It's a complete mystery.