Multiple injuries have been reported after a wreck involving a tractor-trailer and two vehicles closed down all lanes of travel on Interstate 75 Tuesday afternoon.

Jennifer White, Loudon County E-911 director, said the wreck occurred on the northbound lanes of the interstate and was called in at 12:57 p.m. Priority Ambulance, Loudon Fire Department, Loudon County Fire and Rescue, Loudon County Sheriff’s Office, Tennessee Highway Patrol and LifeStar all responded.

The wreck occurred near the 71 northbound mile marker, Travis Estes, Priority Ambulance Emergency Medical Services director, said. Two helicopters from LifeStar and three Priority ambulances responded to the scene.

Both lanes were shut down for "a considerable amount of time," Estes said.

THP Lt. Stacey Heatherly said of the eight people were involved in the wreck, six were transported via air and “private vehicle” to be treated. The status of injuries is unknown.

THP confirmed the wreck involved a tractor-trailer, SUV and minivan. The tractor-trailer had two people inside, neither of whom were hurt. Occupants in the SUV included one woman and three juveniles ages 3, 12 and 16. Two women from Sweetwater were in the minivan.

All parties involved were wearing seat belts and no charges are pending.

“Traffic was slowing in both lanes on Interstate 75, northbound,” Heatherly said in an email correspondence. “All vehicles were in the right lane, the tractor trailer/commercial vehicle came in contact with the SUV from the rear resulting in the SUV then impacting the minivan. The minivan traveled off the roadway to the right coming to a final uncontrolled rest within the median, the SUV went into an uncontrollable spin finally coming to an uncontrolled rest blocking both lanes of travel, and the tractor trailer/commercial vehicle came to a final uncontrolled rest into the median.”

This is a developing story.