Hundreds of women have marched in the Venezuelan capital, Caracas, continuing a wave of protests against the rule of President Nicolas Maduro.
The women, dressed in white and led by opposition MPs, denounced what they consider repression by security forces.
The US has also expressed concern about what UN ambassador Nikki Haley called a "violent crackdown".
At least 36 people have died and hundreds have been injured in weeks of protests.
In a statement, Ms Haley accused Mr Maduro of "disregard for the fundamental rights of his own people", which she said had "heightened the political and economic crisis in the country".
Meanwhile the White House said President Trump's national security advisor HR McMaster on Friday met Julio Borges, the president of Venezuela's opposition-controlled National Assembly.
They discussed the need for the Venezuelan government to release political prisoners and hold free and democratic elections, White House press secretary Sean Spicer said.
Earlier a young man was shot dead in violence in the city of Valencia. In Caracas an armoured vehicle was caught on video ploughing into protesters.
"The dictatorship is living its last days and Maduro knows it," former MP Maria Corina Machado told AFP news agency at the women's march.
"That's why there are these unprecedented levels of repression."