OAKLAND — A woman upset because passengers on a BART train Sunday night complained about her smoking on board responded with a pepper-spray attack on them, sending one women to the hospital, officials said Monday.

The suspect was still being sought Monday.

The incident happened about 6:39 p.m. Sunday at the 19th Street Station on an Antioch bound train.

Police said passengers on the train complained about a woman smoking on the train. Police did not say if the woman was smoking a cigarette or something else.

The woman then began dousing the passengers with pepper spray before fleeing the train. Exactly how many passengers came into contact with the spay was not known, officials said.

BART spokesman Chris Filippi said Monday a 19-year-old woman was taken to a hospital as a precaution to have her eyes washed out.

Police are reviewing train and station video to try and identify the suspect. A detailed description of her was not released.

Check back for updates.