DALLAS -- The intersection of Walton Walker and Kiest was closed for hours Wednesday night in Dallas as police investigated a deadly accident Wednesday night.

It happened at about 6:30 p.m. Dallas police sources said officers spotted a speeding motorcyclist, but – before they could even attempt to stop it – the cyclist accelerated and struck a car at an extremely high speed.

The accident remains under investigation at this time.

Stay with WFAA for updates.