ST. LOUIS COUNTY – The driver of a DirecTV van was killed Thursday afternoon in an accident on Interstate 170.

The accident happened at 11:40 a.m. According to the Missouri State Highway Patrol crash report, 35-year-old Anthony B. Graciani was dirivng the 2010 Chevrolet Express van northbound when he rear-ended a disabled 1999 Mack truck.

The crash report says the semi was experiencing mechanical difficulties so the 42-year-old driver turned on the vehicle's flashers.

Graciani did not notice the semi's flashing lights, and drove into the back of the vehicle. He was taken to DePaul Hospital where he was pronounced dead around 1:20 p.m.

Authorities say Graciani was not wearing a seatbelt.