travel warning to Mexico

For many months now, the soldiers, sailors & Marines in San Diego have not been allowed to cross the border in Tijuana, which has been a traditional R&R location for them.
Yesterday, the U.S. Department of State issued a travel warning to Mexico due to increased violence in the northern part of the country.
Reported incidents range from Americans being followed and harassed, to being mugged and even killed.
The violence in northern Mexico has reached dangerous levels.
As a result, Americans are told to avoid the states of Durango, Coahuila, and Chihuahua, Sinaloa and Baja California.
In daylight, there have been public shootouts in the cities of Juarez, Tijuana and Nogales.
Several US consulate employees and their families have been killed in Juarez.... on the same street as the Police Station!
I am personally aware of some young tourists being killed in Tijuana.
Mexico has been trying to get a handle on this for a few years now, but recently the violence has escalated.