An Arizona teenager who disappeared nearly four years ago is safe after walking into a police station in Montana, authorities said.

Alicia Navarro, 18, of Glendale, showed up alone this week in a small town about 40 miles (64 kilometers) from the Canadian border and identified herself, police in Glendale, a Phoenix suburb, said Wednesday.

Her disappearance sparked a massive search that included the FBI. Santiago said over the years, police had received thousands of tips.

Her mother, Jessica Nunez, raised concerns that Navarro, who was diagnosed as high-functioning on the autism spectrum, may have been lured away by someone she met online.

The name of the town wasn鈥檛 immediately disclosed, but Montana is more than 1,000 miles (1,609 kilometers) from Arizona.

鈥淪he is by all accounts safe, she is by all accounts healthy, and she is by all accounts happy,鈥� police spokesman Jose Santiago said at a .

Investigators were trying to determine what happened to Navarro after her disappearance at age 14 on Sept. 15, 2019.

Police said Navarro told them that she hadn鈥檛 been harmed.

Police said she wasn鈥檛 being held and could come and go as she pleased. She does not face any criminal charges, they added.

鈥淪he is not in any kind of trouble,鈥� Santiago said.

When she disappeared from her home, Navarro left a signed note that read: 鈥淚 ran away. I will be back, I swear. I鈥檓 sorry.鈥�

Lt. Scott Waite said that Navarro had an 鈥渆motionally overwhelming鈥� reunion with her mother and was 鈥渧ery apologetic (as) to what she has put her mother through.鈥�

Nunez confirmed that her daughter had been found but said she had no details.

鈥淚 want to give glory to God for answering prayers and for this miracle,鈥� she said in a .

鈥淔or everyone who has missing loved ones, I want you to use this case as an example,鈥� she said. 鈥淢iracles do exist. Never lose hope and always fight.鈥�

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