The attack in northern Sinaloa state left two military vehicles completely burned out and dead soldiers scattered across a highway. Officials believe the ambush was launched to free a wounded drug suspect being transported in an ambulance guarded by the convoy.
“Up this point we are not certain about this group, but it is very probable that it was the sons of Chapo,” said the local military commander, Gen Alfonso Duarte.
The pre-dawn ambush was the worst attack on military personnel since 2015, when drug cartel gunmen in the state of Jalisco shot down an army helicopter with a rocket launcher, killing 10 people.
https://www.theguardian.com/world/2016/sep/30/mexican-soldiers-killed-military-convoy-ambushed-sinaloa