CARROLLTON (CBSDFW.COM) – Four people are injured after a suspected drunk driver going in the wrong direction caused a four-vehicle wreck.

The incident happened early Sunday morning on a Carrollton freeway and all northbound lanes were closed for hours during the cleanup and investigation.

According to Carrollton police, an SUV and a truck collided in the northbound lanes of I-35E at Whitlock Lane.

Carrollton Police spokesman Jolene DeVito says the SUV was traveling south in the northbound lanes when the wreck happened.

DeVito also says that two other vehicles were involved in the wreck. They hit the debris from the original accident.

The driver of the SUV is under investigation for driving while intoxicated.

Two other vehicles were involved in the wreck when they hit debris from the original collision. DeVito says the SUV driver is under investigation for driving while intoxicated.

No information about the extent of the injuries was available, but victims were and the SUV driver was taken to Parkland Hospital.