Police in Texas say a van loaded with vacationers has rolled over on a highway southwest of San Antonio, killing two people and injuring 14 others.

Texas Department of Public Safety Lt. Steven Tellez says investigators suspect a tire blowout caused the crash early Monday on Interstate 35.

Tellez says the van was carrying 16 members of a family from the Fort Worth area who were going to Mexico for vacation.

Troopers say those killed were a 15-year-old boy and a male adult. The 14 others were taken to several San Antonio hospitals.