People have been stacking up skulls in what is now Mexico City since the Aztecs ruled it.

I just wonder at the timing of this particular raid in late October . . .

MEXICO CITY (Reuters) – Police found more than 40 skulls, dozens of bones and a fetus in a glass jar next to an altar in the den of suspected drug traffickers in Mexico City during a raid this week, authorities said on Sunday.

Four of the skulls were built into the altar in the central Tepito neighborhood, where police arrested 31 people on Tuesday on suspicion of drug cartel activity, the city government said in a statement. A judge ordered 27 of the suspects released.

Vocabulary word of the day: Tzompantli.