Southbound Dallas North Tollway closed in Dallas due to collision

10:54 a.m. update: All lanes of the Dallas North Tollway at Royal Lane have reopened, according to the North Texas Tollway Authority. 

All southbound lanes of the Dallas North Tollway at Royal Lane in Dallas are closed due to a collision Thursday morning. 

According to Dallas police, the morning rush hour collision took place around 8:20 a.m. near the 9800 block of the tollway, and involved three vehicles. No medical transport was provided; however, injuries still remain unknown. 

The North Texas Tollway Authority said drivers should expect delays and heavy congestion on the toll road as crews work to clear the collision. 

Officials suggest motorists take detours to prevent traffic build up in the area. 

This is a developing story.