Striking teachers and other protesters have blocked streets and taken over radio stations in the southern Mexican city of Oaxaca.
The protests began with a teachers strike to demand higher wages three months ago, and have escalated into a campaign to force the state governor Ulises Ruiz to resign.
Monday was to be the first day of school in Oaxaca. Teachers took over radio stations and broadcast messages telling parents to keep their children at home. Protesters also set fire to several buses and blocked highways, gas stations and bus terminals.
Early Monday, there was a shooting attack on a radio station that had been taken over by protesters earlier this month.
Some information for this report was provided by AFP and Reuters.