Investigators in the Democratic Republic of Congo have “serious evidence” pointing to actions against national security, the country’s presidential spokesperson has said. In a statement read on state television on Tuesday night, Kasongo Mwema said such an attempt to “destabilise democratic institutions” would not be tolerated. It follows the arrest on Saturday of François Beya, the special security adviser to President Félix Tshisekedi. According to the BBC, the arrest happened as the president was attending an African Union summit in the Ethiopian capital, Addis Ababa.