 Alliances or agreements between drug cartels have been shown to be fragile, tense and temporary.Mexican drug cartels have increased their co-operation with U.S. street and prison gangs to expand their distribution networks within the U.S.
On March 31, 2014, Enrique Plancarte Solís, a high-ranking leader in the cartel, was killed by the Mexican Navy.On 6 September 2016, A Mexican police helicopter was shot down by a gang, killing four people.