At least 10 people are dead after a van carrying 29 migrants crashed on Wednesday on a highway in Texas, authorities said.

The wreck occurred just after 4 p.m. about 50 miles north of McAllen on U.S. 281 in Encino. The van, designed to hold 15 passengers, was speeding as the driver moved the vehicle off the highway, causing him to lose control and veer into a metal utility pole off the side of the road, according to Sgt. Nathan Brandley of the Texas Department of Public Safety.