Two Southern Maryland teenagers died in separate motor vehicle accidents on Friday.

An 18-year-old Port Tobacco man was killed when he apparently lost control of his motorcycle on Route 225 in Charles County, east of Bilbury Lane.

Brian Joseph James was driving his 1999 Yamaha motorcycle east on Route 225 about 10:15 p.m. Friday when he veered off the road and under an electric fence, the Maryland State Police said. James was flown by police helicopter to Prince George's Hospital Center, where he died from his injuries, according to a statement released by the state police in Waldorf. Alcohol was not a contributing factor, they said.

Lia Nichele DaDamo, 17, of Mechanicsville, was killed instantly about 11:20 p.m. when her 1990 Ford Taurus struck a tree in St. Mary's County.

DaDamo was driving west on Mount Wolf Road, west of Iroquois Road in Charlotte Hall, when she crossed the center line, state police said. She then overcompensated and veered off the roadway, where her car hit a tree, according to a statement from the state police in Leonardtown.

Factors that contributed to the accident were speed and failing to give full attention, police said. Alcohol was not a contributing factor, they said.