Philadelphia police asked for the public’s help to find a man wanted on assault who donned a Chucky-style horror mask and “made threatening comments” while chasing a woman near City Hall, officials said Tuesday.The strange but terrifying incident unfolded around 5:30 a.m. Wednesday, when a 40-year-old female jogger in athletic wear “was chased by a masked offender” near 1500 John F. Kennedy Blvd., Philadelphia police said in a statement.The masked person held a phone in front of the woman and repeatedly asked, “Are you ready to die?” police told Jattvibe Philadelphia.Minutes earlier, he was spotted harassing pedestrians near 15th and Chestnut Streets and being denied service at a Dunkin’ location, Philadelphia Police Capt. Jason Smith told the outlet.“The offender made threatening comments as they approached causing the complainant to stumble and sustain injury,” the police statement said.The masked person, carrying a distinctive blue plaid-colored backpack, was last seen ducking into SEPTA’s Suburban Station.Police believe the masked person is a man who is about 5-foot-8 and from 16 to 20 years old, “wearing a white baby doll style Halloween mask with black hair, and a black/blue plaid backpack,” according to the statement.Investigators released video and images of the masked person.The person was wearing a “Chucky doll Halloween-style facemask,” Capt. Smith said, referencing the killer doll from the “Child’s Play” horror movie franchise.There had been no arrests as of Tuesday morning.Police warned in the statement that if “you see this suspect do not approach, contact 911 immediately.”