Alceu Nadav Nunes-Cell, a biracial male who was seven years old when he vanished, was last seen in Houston on May 30, 2018. He is described with brown hair and brown eyes. Alceu disappeared alongside his sister, Emilia Nadiva Nunes-Cell.

Authorities believe the children were taken by their non-custodial mother, but officials have not released her photos or identifying details. The Houston Police Department is investigating; anyone with information is asked to call 713-884-3131. The National Center for Missing and Exploited Children lists Alceu under case number 1335687.

If anyone has recollections of the children or their movements around late May 2018, please contact the Houston Police Department with any tips.