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This aerial photo provided by NBC4 Washington, emergency personnel respond to the scene of an accident in Wye Mills, Md., on Saturday, Jan. 10, 2015. Maryland State Police say five people are dead after a Virginia family’s car collided with a tractor-trailer. Police say three adults, two children and an unborn child were killed in the crash about 1:15 a.m. Saturday on Route 50 in Wye Mills. The car and truck crashed at an intersection near Chesapeake College. The truck apparently rolled over the car before coming to a rest. (AP Photo/NBC4 Washington)

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30-year-old Zarissa Ayres

WYE MILLS, Md. (AP) — Police say a pregnant woman was behind the wheel of a car that hit a tractor-trailer on Maryland’s Eastern Shore. The woman, her unborn child and four other people were killed in the crash.

State police said Sunday that 30-year-old Zarissa Ayres was driving the car when it hit the tractor-trailer early Saturday morning on Route 50 in Wye Mills.

Ayres, her sister, her niece and nephew and her sister’s boyfriend were on their way from their homes in Virginia to Baltimore. All five were killed. The truck driver was treated at a hospital and released.

No one has been charged in the crash. Police say investigators expect to speak to the truck driver this week. Anyone who witnessed the collision is asked to contact police.