Police surround a group of anti-government demonstrators
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Venezuela detains dozens of anti-government protesters

15 May 2014 Last updated at 04:57 BST

Police in Venezuela have detained at least 80 demonstrators who were demanding the release of those arrested in recent anti-government protests.

Hundreds of people, mostly students, had marched peacefully through the streets of the capital Caracas.

But security forces later clashed with a group of demonstrators who threw stones and home-made explosives, and tried to erect barricades.

Mariko Oi reports.