Philadelphia residents are on edge after a string of sexual assaults targeting women in an upscale neighborhood of the city left authorities searching for the attacker before he struck again.

Five sexual assaults were reported within the ritzy Rittenhouse Square area between July 18 and Aug. 3, with the majority of attacks transpiring in either the late-night or early-morning hours, according to the Philadelphia Police Department. 

“One thing that was interesting about this case is the fact that his five attacks were so similar,” Carole Lieberman, M.D., a board-certified psychiatrist, told Fox News Digital. “They were the same MO, which was approaching the woman from behind, then groping her.” 

t’s a dangerous thing for women anywhere to be out when it’s dark, alone,” Lieberman said. “Some places are more dangerous than others, but you are taking a risk when you do that.”