The FBI has joined the search for a 10-year old girl who has gone missing in Rio Rancho, New Mexico. The New Mexico State Police has already issued an endangered missing person advisory.

Alexandra Greenwall was last seen on Wednesday, October 29 before disappearing. Authorities believe she may have gotten on the Rail Runner transportation system on her way to Madrid, New Mexico, but they have not discounted the fact that she may still be in the Rio Rancho area. Rio Rancho police said the FBI, the Bernalillo County Sheriff’s Department, and the Albuquerque Police Department are all involved in the search.

“We have checked the backyards of all the neighborhoods surrounding the area,” Lt. Paul Rodgers, of the Rio Rancho Police Department, told reporters. “We are now in the process of redoubling that effort and checking again to ensure that there isn’t something that we missed. We are also making contact with her friends.”

Greenwall apparently left home at 6:40 am Thursday morning after a fight with her mother, which seems unusual as she is only 10. “She ran away this morning,” said her mother, Catherine Allen. “We had a fight yesterday; she was really upset and we think that she might be hiding somewhere. We think that she is in the area.”

Police investigation has concluded that Greenwall may have left home with two backpacks full of clothes. One of the backpacks was found near her home, with no other sign of Alexandra.

An AMBER alert has not been issued regarding Alexandra’s disappearance because investigators have no reason to believe she has been abducted at this point, and there has not been any evince suggesting foul play. One of those two criteria must be met in order for an AMBER alert to be issued.

Anyone with information on Alexandra Greenwall’s whereabouts should contact Rio Rancho police at (505)-891-7226.

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