Yesterday:

The mountain where new mass graves found in iguala #mexico. Police blocking acces to graves. 43 students missing pic.twitter.com/i3Y0GqDULj

— manuel rueda (@ruedareport) October 10, 2014

Today:

Just saw students in guerrero, #mexico hijack at least 4buses and 4snack food trucks in protest over missing students pic.twitter.com/XDV97KUFdb

— manuel rueda (@ruedareport) October 11, 2014

Students in chilpancingo now going back to ayotzinapa school w/hijacked buses & trucks. Police didnt do anything pic.twitter.com/Mf0vx2cg64

— manuel rueda (@ruedareport) October 11, 2014

This explains what they are protesting.