The crash happened on the route between Uyuni and Colchani, when one of the vehicles swerved into the oncoming lane.
A public meeting between Presidents Donald Trump and Volodymyr Zelenskyy descended into a spat.
Mexico has extradited 29 senior drug cartel members to the US. They include cartel boss Rafael Caro Quintero.
Violence broke out in the Greek capital Athens as thousands rallied to demand justice for the train crash victims.