UPDATE: Man Found Unconscious Later Says He Was Kidnapped

A 21-year-old Castro Valley man found lying unconscious on a Livermore sidewalk Tuesday night later told police he had been kidnapped, Alameda County Sheriff's Office Sgt. J.D. Nelson said.

However, the man's story "has some serious holes in it," Nelson said.

"So his believability is somewhat questioned," Nelson wrote in an e-mail to Livermore Patch.

At about 6:30 p.m. Tuesday a woman walking her dog on Sixth Street, between South O and P Streets, said she found the man lying on his side in a fetal position. When she went to check on him he did not respond and appeared to be unconscious, she said.

The man also had twist ties around his wrists, the woman told Livermore Patch.

In addition, his cell phone and wallet were on the sidewalk next to him, she said.

The woman, who did not want to be identified in this article, then called police and moments later the man woke up, she said.

"He was disoriented and confused," she said.

temporarily closed down a portion of the street during the investigation.

The case is being handled by the Alameda County Sheriff's Office, and an investigation is ongoing.

Livermore Patch will update this story as more information is made available.