Assailants have killed at least nine members of a fundamentalist Mormon family in northern Mexico, authorities reported Tuesday, burning alive a woman and her children in a brutal assault that highlighted the growing danger posed by organized-crime groups around the country.

Alfonso Durazo, the minister of public security, told a news conference that three women and six children were killed. They were part of a community of U.S.-Mexican dual citizens.

The vicious attack stunned a nation still reeling from an assault by Sinaloa Cartel gunmen on the city of Culiacan last month, which forced the government to hand over the son of Joaquin “El Chapo” Guzmán shortly after he was captured.

President Trump tweeted that “a wonderful family and friends from Utah got caught between two vicious dru

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