The police have not commented on the alleged detention, but the vice-president, Edmand Lara, posted a video on social media congratulating a specialist police unit for having apprehended Luis Arce, in compliance with a resolution issued by a prosecutorial authority. Arce served as Bolivia's president until last November, when he handed over the sash to the centre-right former senator Rodrigo Paz Pereira, who won the runoff in an election that ended nearly 20 years of dominance by the leftist Movimiento al Socialismo (Mas).