The websites of several Mexican government ministries, including Defense and Public Security, went offline on Thursday, and a hacker group claimed responsibility.
The ministry websites as well as several local government sites went down early on Thursday afternoon and could still not be accessed.
A spokesman for the Mexican Defense Ministry said only that the website was experiencing technical difficulties.
Anonymous, a loosely knit group that has attacked financial and government websites around the world, said it orchestrated the shutdowns as part of what it termed OpIndependencia, but did not give a reason for its actions.
Thursday evening marks the anniversary of the start of Mexico’s fight for independence from Spain in 1810. It will be celebrated with a public holiday on Friday.