Bag of Severed Heads Left Near Mexican School

Police were not able to determine if the grisly find, in an Acapulco neighborhood, was connected to extortion threats against teachers. Some 140 schools have closed their doors in recent weeks due to frightened teachers going on strike, according to The Associated Press.

The men's heads were in a sack inside a wooden crate placed near the school, officers said. Messages threatening three aleged drug traffickers were also found in the bag.