Updated

A New York school teacher missing since Aug. 29 was spotted in a midtown Manhattan computer store, FOX News confirmed.

Members of Hannah Upp's family told police Monday that the woman seen checking her e-mail in an Apple store on Fifth Avenue near Central Park was the missing 23-year-old. Cops are still seeking the public's help in locating her.

"We do definitely feel much more hopeful and more encouraged," Upp's brother Dan told the New York Post. "We just want Hannah to come back home safe. We're waiting with open arms and open hearts."

Upp's friends and roommate told FOX News on Sunday that Upp left her personal belongings behind in her apartment — including her purse, wallet and cell phone — and did not indicate that she planned to leave town.

They said Upp was excited to begin her second year of teaching at Thurgood Marshall Academy in East Harlem, N.Y., and it's unlikely that she left willingly. Her ATM card was used at a Times Square movie theater two weeks ago, the Post reported.

Cops, however, doubted that she was the victim of foul play, saying she had also dropped out of sight briefly last semester and may have been dissatisfied with her job.

Authorities and a teachers' union are offering rewards for help finding Upp, who disappeared just days before classes began.

The United Federation of Teachers announced a $10,000 reward Friday, adding to a $2,000 reward offered by the New York Police Department's Crime Stoppers unit.

Upp was last seen about 2:30 p.m. Aug. 29 as she left her apartment in the Hamilton Heights neighborhood, police said.

Click here for more on this story from the New York Post.

FOX News' Laura Ingle and the Associated Press contributed to this report.