Eight people were killed and about 40 others were injured when a charter bus rolled over on a Texas highway on Saturday morning, a state official said.
There were no other vehicles involved in the accident, the Texas Department of Transportation said.
Eleven people were injured later on Saturday when a bus and an SUV collided in Florida near Walt Disney World.
In the deadly Texas crash, the driver of the bus lost control of the vehicle while traveling northbound on U.S. Route 83, about 45 miles north of Laredo, and the vehicle rolled over at around 11:45 a.m. local time, Texas Department of Public Safety Trooper Conrad Hein said.
Seven passengers were confirmed dead at the scene of the crash and another died at an area hospital. Forty-four others were transported to area hospitals, including the driver, Hein said.
Hein said he did not have details on the condition of those injured, but believed some were in critical condition.
The bus had left from the Rio Grande Valley area earlier in the day and was traveling to Eagle Pass, located about 140 miles west of San Antonio, Hein said. The local Laredo Morning Times newspaper said the bus was headed to the Kickapoo Lucky Eagle Casino Hotel when it crashed.
The Texas Department of Transportation said wreckage from the crash forced the closure of the highway about 5 miles south of the Webb-Dimmit County line outside of Laredo.
An image of the scene published by the newspaper showed the red charter bus with its passenger windows blown out and significant damage to the vehicle's rear.
The Morning Times said the bus was operated by OGA Charters, based in San Juan, Texas. Representatives for OGA could not be immediately reached for comment.
In the separate bus crash that occurred in Florida not far from Walt Disney World, 11 people were treated in hospital for injuries after a bus and an SUV collided and caught fire, according to media reports.
A couple and a child in the SUV, which was reportedly traveling on the wrong side of the road, were being treated for serious injuries, while eight of the 16 people on the bus sustained minor injuries.
(Reporting by Curtis Skinner in San Francisco; Editing by Leslie Adler and Ed Davies)
Huit personnes sont mortes et 44 ont été blessées lorsque le chauffeur d'un autocar a perdu le contrôle de son véhicule, qui a fait des tonneaux. L'accident s'est produit à 11h30 (heure locale) samedi sur l'autoroute 83 Nord, au nord de , au .

L'autocar nolisé appartenant à l'entreprise ''OGA Charters'', se dirigeait vers un casino de la ville d', à environ 200 kilomètres au nord-ouest de Laredo. Les causes de l'accident sont pour l'instant inconnues, mais le porte-parole du département de la Sécurité publique du Texas, Conrad Hein, a indiqué qu'il y avait une pluie abondante aux moments des faits. Une équipe du  a été appelé sur les lieux pour enquêter.