At least 55 migrants were killed and dozens more injured in a truck crash in southern Mexico, officials say.
Honduran migrants clashed with Guatemalan police who fired tear gas to those trying to cross into the US.
A semi-truck and a bus carrying passengers back from a pilgrimage to a Catholic shrine crashed and burst into flames in eastern Mexico.
Police targeted isolated groups at the tail end of a caravan of about 3,000 migrants who were making their way through the southern Mexican state of Chiapas.
Thousands of people from the country's southern states were recently internally displaced due to vicious drug wars in their towns and villages, while a procession of migrants heading toward the US border are in the spotlight.
Mexico now faces unprecedented situation of having three caravans stretched out over 500kms of highways in the southern states of Chiapas and Oaxaca, with a total of about 6,000 migrants.
Another earthquake struck off the Mexican west coast on Sunday; the magnitude 5.9 temblor's epicentre 99 km south-southwest of Tonala in Chiapas state.
Some 71 confirmed fatalities are from the state of Oaxaca alone, mostly from its historic city of Juchitan.
The indigenous Tzotzil Mayan Muslim community in Mexico's state of Chiapas numbers at about 600 converts to the religion.
Earthquake strikes the southern coast of Mexico, no immediate damage has been reported yet.
Magnitude 6.1 earthquake hits southern Mexico, no damage reported
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