(Reuters) - It is not viable for Venezuelan opposition leader Edmundo Gonzalez to enter the country, his ally Maria Corina Machado said on Friday, shortly after President Nicolas Maduro was sworn in for a third term despite months of controversy over the country's contested July election.

Venezuela opposition leader Maria Corina Machado was freed on Thursday after a brief detention, her Vente Venezuela movement said on social media. Machado was detained after an anti-government march in Caracas,

Maduro has ramped up his crackdown on the opposition, which international observers believe comfortably beat him in last year’s election.