LOS RAMONES, Mexico — At least one person was killed and 20 were injured when a bus from Houston overturned on the Reynosa-Monterrey Highway, according to reports.

The bus owned by Pegasso Tourism was headed from Houston to Monterrey when it crashed near Los Ramones.

Some passengers were thrown from the bus, according to the Dallas Morning News.

The injured victims were rushed to area hospitals.

They include Luis and Gloria Rodriguez of Houston. The couple was on their way to a home they own in Mexico.

Two of their children showed up at the Pegasso bus station in Houston to buy bus tickets after hearing about the crash. A daughter, also named Gloria, will leave Tuesday night to go see about her parents.

"I want to see my mom and my dad," Gloria said. "I'm too attached to them, they're my whole life."

She said her mother was the most seriously injured.

Frantic father Fernando Garcia also rushed to Pegasso in Houston because his sons were on the bus.

Fortunately, his sons, 11-year-old Mario and 16-year-old Fernando, Junior, survived the crash

“They were asleep – the little one remembers someone laying on top of him – and my older son was looking for him – they were some of the first to get out," Garcia said.

Initial reports out of Mexico suggest the bus driver may have fallen asleep at the wheel. That hasn't been confirmed by investigators.