Two Pennsylvania state troopers and a pedestrian were hit by a vehicle and killed early Monday morning on Interstate 95 in South Philadelphia.

The state troopers have been identified as 33-year-old Martin F. Mack III and 29-year-old Branden T. Sisca. Mack had been a trooper since November 2014 and Sisca since February 2021.

“Troopers Mack and Sisca made the ultimate sacrifice this morning while assisting a citizen in need. These troopers personified our department’s core values of honor, service, integrity, respect, trust courage and duty,” said Col. Robert Evanchick, Pennsylvania State Police commissioner, in a press conference Tuesday morning.

The troopers were responding to reports of a man walking along I-95 south. Authorities told 6ABC as the troopers were helping the man into the back of their cruiser, a female driver attempted to drive past the scene at a high rate of speed.

Her vehicle fatally struck the two troopers and the male pedestrian, as well as the cruiser.

 That driver remained at the scene and state police say they are conducting an investigation that is DUI-related.

"Frances and I are deeply saddened by the tragic loss of these two state troopers and the individual they were assisting," Gov. Tom Wolf said in a statement. "This tragedy is a reminder that our law enforcement officers put their lives on the line every day, and we Pennsylvanians are grateful for the men and women who protect us and our communities."

Trooper Martin F. Mack III and Trooper Branden T. Sisca were struck and killed by a motorist early this morning on I-95 in Philadelphia. - Photo: 6ABC News

Trooper Martin F. Mack III and Trooper Branden T. Sisca were struck and killed by a motorist early this morning on I-95 in Philadelphia.

Photo: 6ABC News

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