A 29-year-old woman has died in a one-vehicle fatal crash that happened sometime early Sunday east of Mitchell.

The name of the deceased is not being released pending notification of family. She was the driver of the vehicle and the only occupant.

A 2006 Chevrolet Malibu was northbound on 413th Avenue when it drifted across the roadway and into the west ditch. The vehicle eventually entered Rock Creek and ended up on its top.

The driver was not wearing a seatbelt. She was pronounced dead at the scene.

While the vehicle was discovered Sunday afternoon, the crash appears to have happened sometime earlier on Sunday.

One person died and another was injured in a trike motorcycle crash that occurred Saturday in Box Elder.

The names of the two people are not being released by state officials pending notification of family members. They were the only persons involved in the crash.

A 2009 Suzuki VL800 was northbound on Liberty Boulevard in Box Elder when the female driver lost control of the vehicle while attempting to turn left onto Interstate 90 westbound. The vehicle left the roadway at the I-90 on-ramp, entered the north ditch and hit a barbed wire fence.

Both occupants, who were not wearing helmets, were thrown from the motorcycle. The 62-year-old male passenger was pronounced dead at the scene.

The female driver, 39, sustained serious non-life threatening injuries and was transported to the Rapid City hospital. Charges are pending against the driver.

South Dakota’s Highway Patrol is investigating both crashes.