FONTANA (CBSLA.com) — Fontana police are searching for a suspect wanted in the sexual assault of a woman at a Metrolink station.

Authorities say a 55-year-old woman who uses a wheelchair called police around 11:30 p.m. Saturday after she said she broke free from a man trying to wheel her to the bathroom at the station near Orange Way and Sierra Avenue.

The woman told police the suspect attempted to isolate her after squeezing her breast and asking her if she was up for sex.

“She was able to fight him off and so he fled on foot. At that point, she called the police department and when officers arrived to to the scene they did a road check around the area but were unable to locate him,” Fontana police spokeswoman Martha Guzman said.

A security guard told CBS2/KCAL9 guards go home after 10:30 p.m.

The incident appears to be renewing fears for passengers like Jorge Iracheta, who says you don’t want to hang around the station platform in Fontana alone after the sun goes down.

“Bad apples. Just looking for whatever they can take, find, steal,” Iracheta said.

“I don’t like to stay around by myself, like now I’m waiting for my son to pick me up,” Maria Lemus added.

Claudia Salcido says her wife carries pepper spray for situations just like this one.

“It’s not something a lady should have to deal with. She should be able to go to work as a anybody else and come home to their families,” Salcido said.

Fontana police are checking to see if there is surveillance video of the suspect.