Police have arrested a California mother hours after she reportedly returned to the downtown Los Angeles train station where she allegedly abandoned her 7-year-old son.

The Associated Press reported that the unidentified woman was taken into custody Thursday afternoon as she arrived at Union Station. Cafe workers had spotted a woman and the boy eating Wednesday evening; Cafe Crepe supervisor Adrienne Garrett said they became alarmed when the child ran into the kitchen and his mother was nowhere to be found.

Garrett claimed she and other employees looked for the woman, who came back to the area 30 minutes later. It was then that one worker told her she should be watching her child, which led her to flee, Garrett said.

“We asked her to come back, but she literally walked out the front door,” she recalled. “She did not even acknowledge anything at all. She was silent and kept walking—and that’s when we decided to get security.”

Transit officers were alerted to the boy at approximately 7 p.m. Wednesday. Earlier reports suggested that the boy was possibly deaf and autistic.

At the time, police said they were trying to ascertain whether the child had “medical issues or developmental issues.” A sign language interpreter attempted to communicate with him with no success, according to AP.

The news outlet reported that the boy was reunited with family upon his mother’s arrest. The mother has since been booked on charges of child endangerment and is being held on $100,000 bail.

[Featured image: Los Angeles Police Department via AP]