In other news from Mexico, concern is growing that the Mexican military may soon crush the populist uprising in the city of Oaxaca. Military planes and helicopters have begun flying over the region. Tanks and troop transport trucks have also been sent to the city of Huatulco — about 150 miles from Oaxaca. The protesters — led by thousands of striking public school teachers — have called for Oaxaca governor Ruiz Ortiz to resign.

• Flavio Sosa, a leader of the People’s Popular Assembly of Oaxaca: “Different barricades have been attacked, the march has been harassed by the police and by the governor of Puebla. Those were the aggressions, and today they sent the helicopters.”