Gospel singer-songwriter Joyce "Dottie" Rambo died early Sunday when the bus she was in ran off a road in southwest Missouri and struck an embankment.

Rambo, 74, of Nashville, Tenn., died in the crash about two miles east of Mount Vernon on Interstate 44, the Missouri State Highway Patrol said. Seven other people in the bus were injured, and were hospitalized in Springfield with moderate to severe injuries, the patrol said.

It was unclear if the accident, which occurred about 2 a.m., was weather-related, the patrol said. Severe storms and tornadoes hit the region about 6 p.m. Saturday, killing 14 people. Sustained winds and storms swept through the area later in the night, according to the National Weather Service.

"She was a giant in the gospel music industry," said Beckie Simmons, Rambo's agent. "Dolly Parton recorded some of her songs."

She was on her way to a Mother's Day performance in Texas, according to her Web site.