In the Mexican state of Tabasco, dozens of employees working on the construction of the Dos Bocas refinery, one of the flagship projects of the President of Mexico, Andrés Manuel López Obrador, have called for a work stoppage.
They complain about low wages and abusive work practices.
The conflict escalated this Wednesday when there was a confrontation between strikers and security forces.
Krupskaia Alís has the details.