Farmers from Mexico City's southeastern district of Tlahuac have unearthed a number of archeological pieces dating back to 1500 BC, local media reported Wednesday. Mexican archaeologist Victor Arribalzaga said the discovery also included some "younger" archeological pieces that might have been produced between 200 AD and 800 AD. The expert was quoted as saying that an archeological site called Tlaltenco in the Tlahuac district was home to a variety of archeological materials, including pots, small obsidian knives among other pieces.