An unearthed skeleton dating back about 700 years is seen at a recently discovered archeological site in Mexico City, Friday, July 13, 2012. According to Mexico's National Institute of Anthropology and History, INAH, the site is about 700 years old and is a neighborhood of Tepaneca merchants. (AP Photo/Alexandre Meneghini)

AP

MEXICO CITY - Archaeologists in Mexico City have unearthed the skulls and other bones of 15 people, most of them the children of traveling merchants during Aztec times.

Researcher Alejandra Jasso Pena says they also found ceramic flutes, bowls, incense burners, the remains of a dog that was sacrificed to accompany a child in the afterlife and other artifacts of a pre-Columbian civilization.

Jasso Pena said Friday that construction was about to start on five buildings in a Mexico City neighborhood when the National Institute of Anthropology and History asked to carry out an excavation of the site first.

Experts suspected the site was an important ceremonial center for the Tepanec tribe between 1200 and 1300. The influential traders living there were called Pochtecas.

Archaeologists say excavation is continuing at the site.

More world news from msnbc.com and NBC News:

Follow World News on msnbc.com on Twitter and Facebook