Authorities have found the man who stole a phone from a woman after she was killed by a Boston area train Thursday night. The individual, whose name has not been released, turned himself in to authorities late Friday.

The woman was struck and killed by a train around 10 p.m. at Downtown Crossing station. Massachusetts Bay Transportation Authority police Lt. Steve Douglas said the victim's identity was not immediately available.

A female bystander said she was on the train when the doors remained closed for several minutes at the station before she and other passengers were evacuated by the MBTA.

"People outside on the platform were gasping and crying," witness Rachel Denham said.

Another person waiting for the train was Jackline Moeda, who said she was listening to headphones but noticed the victim, who was with a companion, leaning over the platform's yellow line warning -- though Moeda assumed she was checking to see the incoming train. However, she said the woman waited until the train car was "really, really" close before jumping into its path.

"I'd never seen anything like that in my life," Moeda said to Boston.com. "Her friend turned around and I'll never forget the look on her face ... She just looked in shock, like all of us were."

The MBTA said that Orange Line service at that station was temporarily closed, replacing the public transit with Red Line service in that area.

The woman's phone, which "became dislodged upon impact," landed on the platform of the Downtown Crossing station, transit police said. A man at the station then casually walked by, picked the phone up and left. He and the phone have since been recovered, and the man will likely be charged with larceny, according to MBTA.

Last week, a man got trapped under an Orange Line train at the Haymarket station and later died from the injuries he sustained.