SHERMAN, Texas (AP) — A charter bus ran off a highway overpass north of Dallas early today and crashed onto its side on a roadway below, killing at least 13 and sending at least 24 people to hospitals.

The bus carrying 55 people to Missouri from Houston may have blown a tire, said Sherman police Lt. Robert Fair.

Police say 12 people died at the scene. Another died at a Dallas hospital, a Parkland Memorial Hospital spokesman told The Associated Press.

They were members of a Vietnamese church on a pilgrimage, KHOU-TV reported.

The bus came to a rest on its right side in the northbound lane of an access road below U.S. 75 around 12:45 a.m. today. Scores of injured were rushed to Sherman and Dallas hospitals via helicopter ambulances.