No leads on Las Vegas woman, daughter missing in Arizona

Police still have no information about a Las Vegas woman and her 12-year-old daughter who went missing in Arizona earlier this month.

Suellen Roberts, 31, and her daughter, Lexis, were last seen at the Bearizona Drive-Thru Wildlife Park in Williams, Ariz., on Sept. 4, according to the Coconino County sheriff's office. Williams is about 200 miles southeast of Las Vegas.

Thomas Steven Sanders, 53, also known as "Spider," accompanied Roberts on the planned trip to Arizona. Police said Roberts and Sanders met at a storage facility in Las Vegas, where they both worked. Sanders also is missing.

According to records, Sanders and Roberts made cell phone calls on Sept. 5, placing them 18 miles north of Williams.

All phone activity has stopped .

Las Vegas police Lt. Rob Lundquist said that the Coconino County sheriff's office is handling the primary investigation and that his unit was assisting.

Police have not determined whether the disappearance was criminal.

They were last seen driving Roberts' 2001 Kia Spectra with Nevada license plate 153UCR, police said.