Texas.– An unlicensed charter bus carrying a Vietnamese-American Catholic group on a pilgrimage to a religious festival blew an illegally treaded tire and skidded off a highway early Friday, killing at least 15 people and injuring dozens, authorities said.

The bus, en route from Houston to Missouri with 55 people aboard, smashed into a guardrail and tipped over along the edge of the road at about 12:45 a.m., crushing one side of the vehicle and scattering luggage, clothes, a sandal and a blood-soaked pillow across the grass and pavement.

Ten people were taken to the hospital by helicopter, and some were in critical condition late Friday.