Unionized teachers protesting against teacher testing have blockaded streets, a shopping mall and even train tracks in the western state of Michoacan.

The Michoacan state police confirm that protesters blocked entrances to the Plaza Escala shopping mall in the state capital.

And the rail company Kansas City Southern de Mexico confirms protesters blocked at least one at-grade rail crossing, snarling rail traffic.

The teachers also blocked streets on Wednesday to demand authorities free two union leaders arrested last week on money laundering and other charges.

The teachers oppose mandatory evaluations enacted under Mexico's education reform, and have staged protests in Mexico City and the colonial city of Oaxaca.

Ten years ago this month, the teachers started a six-month takeover of Oaxaca that didn't end until police stormed the barricades.