Story highlights Leopoldo Lopez has been in prison since 2014

Women's marches and vandalism reported in Venezuela

(CNN) Imprisoned Venezuelan opposition leader Leopoldo Lopez called on demonstrators to keep alive the mass protests against President Nicolas Maduro's government, his wife told reporters.

"We can't stop until we achieve our freedom. I'm on the streets with you, in mind and spirit," he said, according to tweets from his wife Lilian Tintori.

Tintori relayed her husband's words after she visited him on Sunday at a prison outside Caracas.

Lopez, a speaker and leader of the opposition, has been detained since 2014 after he was accused of terrorism and inciting deadly anti-government protests.

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