Venezuela's President Nicolas Maduro delivers a speech during a meeting of leaders of the member states of the Bolivarian Alliance for the Peoples of Our America and the Treaty of Commerce and Promotion (ALBA-TCP),

Venezuela opposition leader Maria Corina Machado was detained at a march in Caracas on Thursday in her first public appearance in months and her ally, former presidential candidate Edmundo Gonzalez, demanded she be freed immediately.

Aides to Maria Corina Machado say the Venezuela opposition leader has been arrested when her convoy was intercepted by security forces as it departed an anti-government protest in Caracas.

The opposition has published ballot box-level tallies that it says show a resounding victory for its candidate Edmundo Gonzalez, who is now on a regional tour to promote the oppos