Authorities say the two were walking Saturday afternoon at Laurel-Bowie Road and Old Chapel Road when they were struck.
Authorities say that the vehicle that hit them was trying to make a left turn off of Old Chapel Road onto Laurel-Bowie Road when it struck them.
Both the girl and her grandmother were taken to a hospital. The girl was pronounced dead and her grandmother is in serious condition.
The driver remained on the scene.
Police released the names of both. The Grandmother's name is Lazina Alae, , age 46 and the Grandaughter is
Dynesti Hope Lazina Maraj both from Bowie, Maryland.
On Sunday the the family of the 2-year old little girl went back to the scene of the accident where she was struck and killed
An investigation is ongoing.