The UPS employee accused of killing a UPS truck driver he was working with in Watertown Tuesday night is currently in custody, according to state police.

The incident occurred after 10:30 p.m. when troopers responded to what initially was reported as a motor vehicle accident on Route 8 North near exit 37 involving a UPS shipping truck.

After locating the driver, Troopers immediately contacted EMS. The victim was transported to a hospital where he died.

The victim has been identified as Nathan D. Burk, of Waterbury. Teamsters Joint Council 10 released a statement on Facebook that said he was a five-year member of Local 677. 

Friends and family held a vigil Wednesday night in honor of Burk.

"I am sure he wanted nothing more than for his mom to be happy on the holidays, his sister, everyone but himself," said Moses Donascimento, a friend of Burk's.

Authorities say 19-year-old Elijah David Bertrand, a UPS employee, fled the scene of the assault but has since been taken into custody. Details surrounding his apprehension were not immediately available.

Police say Bertrand was working with the victim in the same truck. Police say they recovered a weapon on the scene but would not give any more details.

"Two days before Christmas - there are no words to explain," said Despina Tsetsos, another friend of Burk's.

In a statement, UPS says, "We are deeply saddened by the loss of our colleague, and are cooperating with the investigation. Any additional information will need to be provided by local authorities."

Bertrand was charged with murder and is being held on a $2 million bond.