Dallas Police Thursday arrested a man who they believe may have raped multiple women downtown this month.

The alleged serial rapist, a convicted sex offender, targeted women on DART trains and buses.

"I think they need to put a warning up,” said passenger Evonia Lloyd. “Women nowadays we are targets."

Police say women were attacked on July 3 and July 25. There was potentially a third victim, police said in a Thursday afternoon press conference.

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Police say the July 3 attack happened in broad daylight around 2 p.m. In that case, a woman was sitting at a bus stop drinking a beer.

The suspect told her she would get in trouble with police if they saw her drinking. He told her to walk with him.

The victim told police he led her into a stairwell near the Houston Street Viaduct and raped her. Police said the victim was not able to identify the suspect in a photo lineup, so he was released after DNA was collected.

In an attack that happened late at night on July 25, the victim was riding a DART train when the suspect, who introduced himself as “Rodney,” sat next to her.

He invited the victim to get something to eat as they walked along Ross Avenue. Police say he grabbed her and sexually assaulted her.

The second victim identified the suspect in a photo lineup.

"Not everyone is as friendly as you think they are,” Lloyd said.

Jackie Cabrera said Thursday was the first day she had ever ridden on a DART train and she's worried.

"They should let us know there is going to be a bunch of girls coming on the train now," she said.

DART said it was not aware of the incidents until Dallas PD told them about it Thursday and are looking for footage of the suspect from the many surveillance cameras in the area.

The organization was asked to review footage from the West End Station.

"We are currently doing so and will make anything we find immediately available to Dallas police for their investigation," DART said in a media release Thursday afternoon.

The suspect is a black man, roughly 5-foot-5 and 160 pounds with tattoos on his face and covering both arms. He was wearing a white T-shirt and dark or green pants in both incidents.

He will be charged with felony sexual assault and with failure to register as a sex offender. Police did not immediately name the suspect or release a mug shot.

An investigation is ongoing.