Electoral watchdogs at the Organization of American States have expressed concern over the low turnout in Mexico’s historic and contentious judicial elections.

Around 13% of Mexicans likely turned out to vote in the country's first-ever judicial election, Mexico's INE electoral authority said on Monday, as the government hailed a successful process while analysts said the low turnout could undermine an already controversial reform.

The Morena party controls most of Mexico’s government. Its sway over the Supreme Court is set to increase after a judicial election that raised fears about democracy.