Students have scuffled with riot police at a demonstration in the Venezuelan capital Caracas.
The government of Nicolas Maduro has faced a wave of street protests since February 4, with protestors angry over high levels of crime, hyper-inflation and shortages of essential goods.
Maduro has offered dialogue, but protest leaders are in no mood to negotiate.
They say there is no room for talks until the police stop opressing the opposition.
Al Jazeera's Mariana Sanchez reports from Caracas.