SAO PAULO, Brazil (AFP)—Brazil denied visas for two US officials who sought to meet with Brazilian election authorities less than three months before a tense presidential vote, a diplomatic source told AFP on Saturday.

The Brazilian source, who spoke on condition of anonymity, cited a “risk of political exploitation” as being behind the decision.

It comes after Brazil’s right-wing candidate Flavio Bolsonaro renewed unfounded claims this week that the country’s electronic voting system is insecure, and as US President Donald Trump continues to press falsehoods about American elections.