Opposition activists prepare to launch a fiwork at riot police during a protest against the government of President Nicolas Maduro in Caracas on June 7, 2017. The head of the Venezuelan military, General Vladimir Padrino Lopez, who is also President Nicolas Maduro's defence minister, is warning his troops not to commit "atrocities" against protesters demonstrating in the country's deadly political crisis. Tuesday's warning came after more than two months of violent clashes between protesters and security forces. Pic/AFP

A 17-year-old Venezuelan protester died in ferocious clashes between security forces and protesters in Caracas on Wednesday, taking the death toll from unrest since April to at least 66.