A 12-year-old suspended from school for fighting killed a 10-month-old baby by throwing him to the floor at a home where several young children were unsupervised, officials said Wednesday.

The preteen boy, whom authorities wont name because of his age, was charged as a juvenile with capital murder. A judge Wednesday ordered him held in juvenile detention.

The 10-month old, Deandre Washington, was injured on March 12 and died two days later at a hospital, said Child Protective Services spokeswoman Estella Olguin.

Authorities still are trying to determine how many children were in the house in a working class section of southeast Houston when the mothers of the two sets of siblings left them alone. They also dont yet know whether the 12-year-old, who was the oldest in the group, was specifically left in charge.