DPS investigating fatal crash along Loop 303

Officials with the Arizona Department of Public Safety say a crash involving a commercial vehicle in the northwest Valley has turned deadly.

What we know:

In a brief statement released on the morning of Dec. 15, a DPS spokesperson said the incident happened at around 5:35 a.m.

"A commercial truck-tractor pulling a semitrailer rolled over on the westbound SR-303 at milepost 134, two miles east of Lake Pleasant Parkway in Phoenix," read a portion of the statement.

In a later statement, the DPS spokesperson confirmed the fatality.

What we don't know:

DPS officials did not identify the person who died in the crash.

Area where the crash happened

PhoenixNews