EMBED >More News Videos Watch Action Cam video from the scene where a woman was chased and assaulted in a park near La Salle University.

EMBED >More News Videos Woman sexually assaulted: Katherine Scott reports during Action News at 5:30 a.m. on September 8, 2017.

18 yr old victim of sex assault in Logan released from hospital. Police say a substance was thrown in her face during attack. — Katherine Scott (@KScott6abc) September 8, 2017

18 yr old La Salle student attacked in Logan. Alert went out overnight to students. — Katherine Scott (@KScott6abc) September 8, 2017

LOGAN (WPVI) -- The search is on for two men who assaulted a female La Salle University student in a park a few blocks from campus."These are two violent predators we have to get off the street before they do this to someone else," said Philadelphia Police Commissioner Richard Ross. "You don't do something this horrific and stop there."Friday morning, investigators were back near the basketball court at Kemble Park in Logan, searching for evidence in the case, which is being investigated as a sexual assault.Officers were called around 11:45 p.m. Thursday to Ogontz and Olney avenues.Police say the 18-year-old victim had been walking on Olney Avenue by the park when she noticed two men were following her."She actually was on her phone talking to her boyfriend," said Ross. "And she felt uncomfortable and asked him to call the police. And then those males grabbed her."Police are investigating a report that the suspects threw bleach on the victim during the attack."There is an allegation that some form of bleach-like substance was thrown in her face," Ross told Action News. "They threw her to the ground. She was physically assaulted and possibly sexually assaulted."Police arrived shortly after the call made by the victim's boyfriend made.La Salle officials were notified. They sent a victim's advocate to help the woman as she was interviewed at the Philadelphia Police Special Victims Unit.The advocate remained with the woman and her family for hours to provide support and resources.An alert went out to students overnight. School officials are reiterating that there are services available to help students get home safely."You can be anywhere near campus, and you are in our escort zone," said La Salle Vice President for Student Affairs Dawn Soufoeris, PhD. "All they have to do is call public safety. We have a shuttle that will get them... for most of the day and night."----------