A group of heavily armed men burst into a hostel restaurant frequented by truck drivers and opened fire in Guanajuato state.
Heavily armed Hezbollah, a militant Shia group, has also been designated a terrorist organisation by the US government.
The clashes between hundreds of US-bound Central Americans and the Mexican National Guard underscores the challenge President Andres Manuel Lopez Obrador faces to contain migration at the bidding of his US counterpart Donald Trump.
Standing on the wall above the Rodolfo Robles International Bridge that connects Mexico with its southern neighbour, National Guard General Vincente Hernandez told migrants they would be allowed to cross the border in a "controlled" manner.
Guatemala's new President Alejandro Giammattei says his country was breaking off relations with Venezuelan government of President Nicolas Maduro and would close its embassy in Caracas.
Authorities in Guatemala say 1,350 Hondurans have submitted documentation to pass through the country, in bid to join hundreds of others heading for US.
Close to 1,000 people gather in Honduras' second largest city forming a migrant caravan that will soon head for the US, as Guatemala leader says Mexico plans to contain the migrants.
There are 10 women killed daily on average across Mexico, and only one in 10 such crimes are solved.
The 1.93-kilogram bar was found by a construction worker during excavations for a new building along the Alameda, a picturesque park in the heart of the Mexican capital.
Plastics industry association ANIPAC says the roughly 20 million people who live in Mexico City and its sprawl use about 68,000 tons of bags a year.
Prisoners fought each other with handguns and knives, which were seized after the fight, said the state's Public Security Ministry.
The female giraffe was unveiled last week after a mandatory quarantine period following her Oct. 23 birth.
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