Upper Darby police are searching for a third man who was involved in what Superintendent Michael Chitwood described as a brutal "wolf pack" robbery inside 69th Street Terminal on Christmas morning.
The 48-year-old victim was returning from work and waiting for the bus around 1:40 a.m. Thursday when three males approached him and demanded his SEPTA TransPass, according to police. They punched and kicked him and threw him down the steps.
"These guys were at the terminal for one reason only, to rob and steal something," Chitwood said.
SEPTA police quickly apprehended two of the men, identified by police as Anthony Johnson, 25, and Paul Whyte, 24, both of Philadelphia. 
The victim, who required treatment at Delaware County Memorial Hospital for an eye laceration and other head and neck injuries, was able to bite Johnson's finger as Johnson held his hand over the victim's mouth. 
“The guy was trying to keep him from yelling," Chitwood said of Johnson. "He didn’t bite it off."
SEPTA police were able to confirm that Johnson was one of the perpetrators by calling the victim's cell phone.
"Lo and behold, in Johnson's front pocket is the victim's phone," Chitwood said.
Johnson and Whyte are charged with robbery, aggravated assault and related offenses. Cops are still searching for the third attacker.
"These guys that do these wolf pack attacks, they truly are evil," Chitwood said. "Here's a guy, 48 years old, working on Christmas Eve, coming home from work and these guys are going to steal what he’s got. It's just mind boggling."
Anyone with information about the third attacker can call Upper Darby Police at 610-734-7686.