I've just had a look on google and got the following info -
Report on Oaxaca: Mexico's National Human Rights Commission blasted the federal government for failing to stop the killings of 20 people during a six-month conflict in Oaxaca last year. The report stopped short of saying Gov. Ulises Ruiz of the Institutional Revolutionary Party was directly involved in the killings, but criticized Ruiz and the federal government for failing to stop them. The report said 11 people were killed as a direct result of the conflict and nine as an indirect result.