At least 16 migrants from Venezuela and Haiti have died in a bus crash in southern Mexico, prosecutors in the Mexican state of Oaxaca said.

Among the victims were three children and two women, and at least 29 were injured.

Mexico's National Institute of Immigration said the incident occurred yesterday morning in the southern state of Oaxaca.

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The bus, carrying a total of 55 migrants, mostly from Venezuela, overturned on a winding stretch of highway.

This is the latest tragedy of dead migrants from Latin America traveling north to cross the border between Mexico and the United States.

As the flow of migrants increases, Mexican authorities are carrying out more checks on regular buses, prompting smugglers to look for increasingly risky ways to smuggle migrants.

Last week, a cargo truck carrying migrants from Cuba crashed on a highway in the Mexican state of Chiapas, not far from the border with Guatemala. Ten people were killed, all of them women.