<sod >The clashes have turned violent and five people have already been killed Demonstrators cover their noses and mouths with handkerchiefs as they run from tear gas, being deployed by the National Guard against the opposition A man in a gas mask and a large leather gloves carries protection as he walks past a small fire which has been left burning on the streets of Caracas Opposition leaders say the depth of the economic collapse in oil-producing Venezuela, in which millions struggle daily with food shortages, will prove a game-changer.< eod>< sod > The clashes have turned violent and five people have already been killed Demonstrators cover their noses and mouths with handkerchiefs as they run from tear gas, being deployed by the National Guard against the opposition A man in a gas mask and a large leather gloves carries protection as he walks past a small fire which has been left burning on the streets of Caracas 'This is a government in its terminal phase,' two-time presidential candidate Henrique Capriles said on Tuesday.< eod>