Police on Long Island are investigating a fire that killed a 17-year-old boy and critically injured his 16-year-old sister.
Smoke and fire was rising from the rear of the house. Neighbors told firefighters that the house was occupied.
Alvarez was listed in critical condition suffering from smoke inhalation and burns.
Authorities say the children's mother, Zulma Zayas, escaped uninjured through a bedroom window.