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The FBI issued a BOLO alert for a 16-year-old Hardin girl who has been missing for more than a week.

The BOLO, which stands for "be on the lookout," was issued just after 4 p.m. on Wednesday by the FBI and asked for the public's help in finding Selena Shelley Faye Not Afraid.

It's the first official alert since a Missing and Endangered Persons Advisory was issued for Selena on New Year's Day, hours after she was last seen.

An amber alert has not been issued for the girl. Amber alerts, distributed to local media and as text messages to anyone in the region with a mobile phone, are used specifically for cases involving minors in which an abduction is believed to have occurred.

Selena was last seen New Year's Day around 2 p.m. at the eastbound rest area at mile marker 474 off of Interstate 90 between Billings and Hardin. She reportedly walked away from the rest stop after the people who were giving her a ride to Hardin drove off and left her and another woman at the rest area.