(NDAgConnection.com) – Brazilian authorities sought on Tuesday to curtail truckers’ blockages protesting the country’s presidential election results after signs they were disrupting fuel distribution, meat production and the ability to send grains to port.

According to Reuters, blockades were first reported on Sunday amid spreading demonstrations by truckers and other supporters of Brazilian President Jair Bolsonaro, challenging his narrow election loss to leftist Luiz Inacio Lula da Silva.

Truckers, one of Bolsonaro’s key constituencies and who benefited from his policies to lower fuel prices, have previously disrupted the Brazilian economy by shutting highways in recent years.

Some truckers have called for military intervention to keep Bolsonaro in power. The president gave a brief statement Tuesday afternoon, the first since the Sunday vote, and said the protests reflected dissatisfaction with the electoral process, but said he would abide by the constitution, which stipulates a transition of power of Jan. 1.

Bolsonaro did not concede defeat, but his chief of staff said their team would begin the process of transition to a Lula government.