Mass child sacrifice from a Toltec tomb in Mexico is the theme of this National Geographic article. The story has apparently been covered elswhere, but this brings all the threads together quite nicely.

The skeletons of two dozen children killed in an ancient mass sacrifice have been found in a tomb at a construction site in Mexico. The find reveals new details about the ancient Toltec civilization and adds to an ongoing debate over ritualistic killing in historic Mesoamerica.

. . .

The chamber contained 24 skeletons of children believed to have been sacrificed between A.D. 950 and 1150, according to Luis Gamboa, an archaeologist at Mexico's National Institute of Anthropology and History.

All but one of the children were between 5 to 15 years of age, and they were likely killed as an offering to the Toltec rain god Tlaloc, Gamboa said. The Toltec, a pre-Aztec civilization that thrived from the 10th to 12th centuries, had not been previously thought to have sacrificed children.

But the ritualistic placement of the skeletons, cut marks on bones, and the presence of a figurine of Tlaloc led Gamboa to conclude the children had been sacrificed to bring rain.

The article carries over two pages, and is accompanied by photographs (nothing gory) and a map showing the location of the site.