A 21-year-old woman was killed Saturday in a single vehicle collision on Snowden River Parkway in Columbia.

According to Howard County Police, Mary John, a resident of the 6100 block of Good Hunters Ride in Columbia, was driving a Lexus southwest on Snowden River Parkway at approximately 11:30 a.m. when she swerved to avoid hitting another vehicle and struck a tree.

The driver, who was the vehicle's sole occupant, was pronounced dead on the scene by paramedics. No one else was injured, according to the police department.

-- Sun staff