The assault occurred around 2:45 p.m. on Tuesday, Nov. 3, along Race Street near 10th Street, according to police. Newly released video shows the woman trying to step out of the way as the man rides past while sipping a drink; he then extends his arm and sends her to the pavement. A second camera angle shows him riding on without looking back, turning south onto 10th Street.

First responders were seen outside a nearby restaurant before medics took the victim to a hospital, where she was treated for pain and swelling to her face.

Investigators believe the man had just picked up a food delivery order shortly before the incident. In the footage, police point to a pink beanie, red Nike sneakers and an orange Grubhub delivery bag. It is not clear whether he works for the company.

A Grubhub spokesperson said the company takes the allegations seriously. "The safety and well-being of our customers, delivery partners and the communities we serve are incredibly important to us," the statement said. "We take allegations of violence very seriously and are actively looking into this matter. Our thoughts are with the person affected by this incident."

The attack has unsettled residents and workers in a neighborhood where delivery bikes are a constant presence on crowded sidewalks.

"She's a woman, you're a man, you know what I mean," said Ken Chan, a Chinatown resident of 45 years, who said he was shocked by the daytime assault. "I never saw it happen like that in the daytime."

Maria Santiago, who works at a nearby condo building, said the news left her frightened for the residents she serves. "I'm 60 myself, and that's a lot of concern," she said. "I feel very scared. I got to let my residents know about this."

Police are urging anyone with information to call or text 215-686-TIPS (8477) or submit an anonymous tip online through the department's website.