A 20-year-old Federal Way man was arrested Tuesday afternoon after losing control of his Honda Civic on southbound Interstate- 5 and plowing into a Ford Expedition.

The impact, near Mounts Road in DuPont, caused the SUV to strike a barrier and roll, according to KIRO-7. Three adults and six children — none of whom were wearing their seat belts — were inside the SUV. A 3-year-old and a 6-year-old were ejected from the vehicle and taken to Mary Bridge Children’s Hospital. Three other children, ages 9, 10 and 16, were also taken to the hospital, along with two pregnant women and a man.

The driver of the Honda was arrested on suspicion of driving under the influence of alcohol or drugs and vehicular assault, according to KIRO.

The crash blocked two southbound lanes and caused traffic back-ups on southbound and northbound Interstate-5. Southbound drivers were backed up for 11 miles and northbound motorists experienced 10 miles of traffic congestion.