Police investigating fatality crash in southeast Arlington

The Arlington Police Department, Fire Department, and EMS responded to a single vehicle crash this morning at around 7:21AM in the 1500 block of E. Sublett Road near S. Collins Street.
Preliminary details indicate an SUV was traveling westbound on Sublett and, for an as of yet undetermined reason, left the roadway. The vehicle struck a tree.
The driver was pronounced deceased on the scene. There were two other children in the vehicle that were taken to an area hospital with non-life-threatening injuries.
Police are still investigating the cause.