CHICAGO (CBS)–The baby of a pregnant pedestrian, who was was fatally struck by a flatbed truck in Chicago’s River North neighborhood, has died.

The 29-year-old woman, identified as Elizabeth Boshardy of the Ukrainian Village neighborhood, was crossing near the intersection of LaSalle Drive and Grand Avenue Tuesday morning when she was hit. Friends had told CBS 2 that Boshardy was pregnant at the time of the incident.

According to the medical examiner, Boshardy’s baby, Hannah Elizabeth Boshardy, was pronounced dead Saturday morning at just four days old.

The official cause of baby Hannah’s death was ruled to be complications of prematurity, and maternal death due to multiple injuries from a truck striking pedestrian. The manner of her death was deemed to be an accident.

The truck driver was heading west on Grand Avenue and turning left when the truck hit Boshardy. A witness said the woman was in the crosswalk and had the right of way.

Boshardy was taken to Northwestern Memorial Hospital where she was pronounced dead, police said.

Officials said a citation was issued to the truck driver for failing to yield to a pedestrian in a crosswalk.

The truck involved is registered with the U.S. Department of Transportation with the “Rauch Clay Sales Corporation.”