AURORA, Colo. - Aurora police have identified a man who walked into a McDonald's restaurant on Saturday claiming he had amnesia as a missing 23-year-old resident of New Mexico.

Police don't know how he ended up in Colorado or what caused the memory loss, Aurora police spokeswoman Sgt. Cassidee Carlson said in an email late Tuesday night.

The man, whose whose name was not released, has been missing from New Mexico since Thursday, Carlson said.  Family members of the man are traveling to Colorado to pick him up.

The man walked into the McDonald's on East Colfax between Sable Boulevard and Interstate 225 at 2:30 p.m. Saturday. He asked for help, saying he could not remember anything about his identity and anything about his past.

He had no identification, no phone, nor identifying documents, Carlson said. He was taken to the hospital for evaluation but there was no sign of injury or trauma, Carlson added.

His fingerprints were run through a national database but there were no matches, she said.

Earlier Tuesday, police released several pictures of the man and of his tattoo, located on his right shoulder. The tattoo is of a sword encircled by a ribbon with a crescent behind it.