A mother has died after she and her three children were hit in a crosswalk Monday evening .
Las Vegas police reported Thursday afternoon that 25-year-old Fatima Ahmadi had died Wednesday at Sunrise Hospital.
Her 4-year-old son, Abdulwahab Noori, died shortly after the crash involving a pickup truck near Maryland Parkway and Katie Avenue. His two younger sisters, ages 2 and 3, are expected to recover from their injuries.
Police said the 74-year-old driver of the truck remained at the scene, passed a field sobriety test and is cooperating with the investigation. Police said it was the third fatal auto-pedestrian crash involving a child within a month.