NORTH LAS VEGAS, Nev. -- Authorities say a domestic-related shooting in front of a suburban Las Vegas day care center left a man and woman dead and their two young children hospitalized with gunshot wounds.

It was not clear whether the mother or father fired the shots or whether the 3-year-old girl and 4-year-old boy were intended targets, North Las Vegas police spokeswoman Ann Cavaricci said. The children were hospitalized in stable condition with non-life-threatening injuries.

The shooting happened around 6:10 a.m. Thursday in the front parking lot of the Kids Campus Learning Center. Police say employees were at the center as it opened, but no other children were around. No one else was hurt.

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Authorities have not identified the family and said it was clear what the adults' relationship status was.

The workers initially cared for the children and reported the shooting to police, Cavaricci said.

"They opened the doors and brought the children inside, called 911," she said. "They did everything they could to make sure those kids were safe."

Police say the incident is domestic-related, and no suspects are being sought.

It's not clear if the children attended the day care, which closed for the day.

The center declined to comment.