From france24.com:

Unidentified assailants armed with guns and Molotov cocktails attacked power stations in a violence-torn western Mexican state Sunday, leaving 11 towns without electricity in a suspected drug cartel attack.

The interior ministry said in a statement that national power company equipment, six gas stations and a convenience store were targeted in 11 towns in the state of Michoacan, but that nobody was hurt .

The statement did not identify the assailants, and interior ministry spokesman Eduardo Sanchez said authorities were investigation the attacks.

http://www.france24.com/en/20131028-mexico-towns-lose-power-suspected-cartel-sabotage