A missing person sign is posted on a lamp post near the home of ten-year-old Jessica Ridgeway where police continue to search for the missing girl in Westminster, Colo., on Wednesday, Oct. 10, 2012. The youngster has been missing since she left her home Friday morning on her way to school. (AP Photo/Ed Andrieski)
A missing person sign is posted on a lamp post near the home of 10-year-old Jessica Ridgeway. The youngster has been missing since she left her home Friday morning on her way to school.
Ed Andrieski/AP

Authorities are probing whether an abandoned station wagon with Colorado license plates found this morning in Portsmouth, N.H., is connected to the case of a missing 10-year-old Colorado girl, according to a published report.

The vehicle was found behind the Walmart off Constitution Avenue, the New Hampshire Union Leader reported. Colorado authorities received a tip that has not yet been corroborated about a similar vehicle being involved in the abduction, Portsmouth Police Sergeant David Keaveny told the newspaper.

Jessica Ridgeway, of Westminister, Colo., went missing Friday morning while walking to school. Since her disappearance, Westminister police have organized numerous ground searches and received hundreds of tips.

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Maine authorities issued a statewide alert Wednesday after a woman, who had seen Ridgeway’s picture on the Internet, said she saw a girl who looked like Ridgeway in a blue station wagon in Dexter, Maine, on Sunday, KMGH-TV reported Wednesday.

The car would have to have been driven almost nonstop to have made it there from Colorado by that time after Ridgeway’s disappearance.

Police have recovered Ridgeway’s backpack and a water bottle that she was carrying when she disappeared about six miles from her home, but they have not commented on the contents of the bag or any test results on the items.

“WPD confident #JessicaRidgeway’s parents are NOT involved in the disappearance, focus is not on parents and believe this is an abduction,” an official tweet from the police department said Wednesday morning.

On Wednesday, a body was discovered a few miles south of Westminster in Arvada, Colo. Police have been working to identify the body but not have commented on whether it is the body of a child. Authorities also announced in a tweet that they would continue canvassing neighborhoods and conducting open field searches.

Ridgeway is about 4-foot-10, has shoulder-length blonde hair and blue eyes. Police urged anyone with information to call Westminster police, 303-658-4336.