UPDATE:

A retired state trooper has been identified as the man who shot and killed two Pennsylvania Turnpike workers in a tollbooth robbery attempt on Sunday, before being shot and killed himself in an exchange of gunfire with police.

Authorities identified 54-year-old Clarence Briggs of Newville as the man who attempted the armed holdup at a tollbooth in Fort Littleton, off I-76 in Fulton County, at around 7 a.m.

Briggs is a former state trooper whose tenure included time spent with a division overseeing turnpike operations in the area and ended with him being honorably discharged in 2012. It was not immediately clear if Briggs was previously known to his victims.

Pennsylvania Turnpike Commission Chairman Sean Logan choked back tears as he identified the victims of Sunday's shootings as 55-year old Danny Crouse and 72-year-old Ronald Heist.

Logan said Crouse had only been on the job for three months, while Heist, a retired York City Police officer, had worked for the turnpike commission as a security contractor.

"Today we lost two members of the turnpike family and extended family in a holdup attempt," Logan explained in a press conference held Sunday afternoon, just miles down the road.

In a synopsis of the incident provided by state police captain Dave Cain, it was reported that Briggs arrived at the toll located at the Fort Littleton Interchange and presented a weapon.

Briggs reportedly forced two workers, one of them Crouse, into a nearby building where a struggle ensued and the two workers broke free as Briggs attempted to tie them up.