Since September 9th, a war between two factions of the Sinaloa cartel has been going on in the Mexican state of Sinaloa. As of December 24th, the death toll had reached 650. That’s in addition to the missing, so it may well be higher.
The violence pits one faction, led by the son of “El Mayo” Zambada against the Chapitos, sons of “El Chapo” Guzman.
Here is a map of Mexico, with the state of Sinaloa in red:
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For previous reports on this situation, see here, here, here , here , here , here and here.