MEXICO CITY (AP) — Mexican authorities say they have found a clandestine burial pit with at least five corpses in a town where President Andres Manuel López Obrador got his political start.

Prosecutors in the Gulf coast state of Tabasco said late Tuesday they found the bodies of five adults after about a day of digging, but can't determine their ages or identities yet.

The state prosecutors'office said “there are indications there could be more in the pit,” but that would have to be confirmed by further excavation.

The pit was found in the Tabasco township of Nacajuca, an impoverished but relatively quiet Chontal Indian town where López Obrador served as the government representative for the Indigenous Institute in the late 1970s and early 1980s, his first major public post.