Machado ally 'kidnapped' after calling for Venezuela elections
Machado said a group of heavily armed men in civilian clothes seized Juan Pablo Guanipa, 61, in the Los Chorros district of Caracas.
The former National Assembly vice president had walked out of jail Sunday as part of a slow-moving wave of releases of political prisoners.
The Public Prosecutor's Office later confirmed Guanipa had been detained for violating the terms of his release and would be placed under house arrest, without providing more details.
"They haven't told us where my father is...