Correction: Due to incorrect information provided by police, an earlier version of this story said the boy’s aunt was struck by the vehicle. This version has been corrected.

A 4-year-old boy was hit by a sport-utility vehicle in Alexandria on Saturday and killed, and his mother was injured , authorities said.

The incident occurred just after 11 a.m. in the 6300 block of Stevenson Avenue, police said. They said the boy ran into the street and into the path of a 2010 Jeep Commander headed east. His mother , who was holding her 3-year-old nephew , ran after him. Both were hit by the vehicle, police said.

Ashley Hildebrandt, an Alexandria police spokeswoman, said it appeared that the boy ran into the street as his family was preparing to cross.

Hildebrandt said there was no crosswalk in the area, but police were still looking into all the factors that contributed to the incident.

The 4-year-old was taken to a hospital and later pronounced dead. The mother was taken to the hospital with injuries not thought to be life-threatening.

Hildebrandt said the mother was able to protect the 3-year-old, who was not hurt.

The driver of the SUV, an 84-year-old man, stayed at the scene of the incident.

Hildebrandt said that no one was cited or charged and that it was too early to assign fault because the investigation was continuing.

Police closed Stevenson Avenue for several hours Saturday while they investigated the case.

Police did not release the identity of the victims so that family members could be notified first.