Bomb Blasts in Mexico City

La Jornada reports that bombs went off in the national PRI headquarters, the Electoral Tribunal at the Judicial Branch of government, and at a ScotiaBank location.    Another bomb, supposedly found in a wooden box with the words "Danger, Bomb" on it, is said to have been disabled at another bank location before it exploded.

The blasts seem to have been strong enough to do serious damage to the rooms where the bombs exploded, but the purpose of the explosions (if they were to have been planned by a protest group) are not clear.  No one was injured, and the bombs are suspiciously similar to recent blasts at banks in Oaxaca that many suggested were done by right wing or government provocateurs.  I am not familiar with the link between the Scotia bank and the federal electoral fraud.