The United States has issued previous alerts for travelers to Mexico , including one last July when the State Department cautioned visitors to Cancun after violent protests there by city workers .
Mexico /location/location/contains Cancun
DT NNP NNPS VBZ VBN JJ VBZ IN NNS TO NNP , VBG CD JJ NNP WRB DT NNP NNP VBD NNS TO NNP IN JJ NNS RB IN NN NNS .
Mexico
LOCATION
Cancun
LOCATION
/location/location/contains