Strike action could lead to road closures to and from the airports in Bolivia.
The Foreign Office has warned that there may be disruption to public transport and possible blockades in Potosi due the action.
It said: "Social conflict is common in Bolivia and blockades may occur along the main roads.
"Public transport can be disrupted at very short notice and strikes may result in widespread road blockades, including on roads to and from airports. You should never try to cross a blockade.
