Thirteen people were killed when a charter bus from Houston careened off an overpass in north Texas.
Fifty-five passengers were on board the bus from Houston to Carthage, Mo., when the bus ran off U.S. 75 north of F.M. 1417 in Sherman, Texas, at about 12:45 a.m. Sherman is about an hour north of Dallas.
The passengers were from Vietnamese Martyr Church in southeast Houston.
Sherman police said the bus went off a bridge and flipped into a creek.
"We don't know if the vehicle rolled or not," Lt. Bob Fair said. "It was reported that a tire was blown on the vehicle, on the bus. It's being investigated to see if that is, in fact, the cause of the accident or why the driver lost control of the bus."
Thirteen people have died from their injuries. Their names have not been released.
Dozens of others were injured and medical helicopters took several to Dallas-area hospitals for treatment.
A spokeswoman for Wilson North Jones Medical Center said it received 16 patients, four of whom were in critical condition.
Eight patients were taken to McKinney Medical Center, including one child. Six of those patients were in fair condition and two were in serious condition.
More patients were taken to Baylor, Parkland and Methodist hospitals in Dallas and other hospitals in north Texas and south Oklahoma.
The name of the charter bus company has not been released. The bus was not marked.