A 20-year-old male demonstrator has died in Caracas after being hit by a gas canister, bringing the death toll from this month's anti-government unrest to at least 29. Juan Pablo Pernalete Llover was a student of political accounting at Metropolitan University. Ramón Muchacho, the mayor of Cachao municipality, tweeted that medics at the local hospital worked for 40 minutes in an effort to resuscitate Llover, to no avail.

Venezuela protests Caracas
An opposition supporter is helped after being injured by a tear-gas canisterChristian Veron/Reuters
Venezuela protests Caracas
Opposition supporters show empty cartridges during clashes with security forces at a rally against Venezuela's President Nicolas Maduro in CaracaMarco Bello/Reuters
Juan Pablo Pernalete Llover
Juan Pablo Pernalete Llover, aged 20, who was killed by the impact of a tear gas canister

Amid another day of nationwide opposition rallies, violence erupted in the capital when National Guard troops and police blocked off a highway where several thousand demonstrators were marching to deliver a message to the national ombudsman, whose job is to stand up for citizens' rights but who the opposition calls the "defender of the dictator".

Venezuelan security forces fired scores of tear gas volleys at the protesters, who responded with rocks and Molotov cocktails. When water cannons were turned on the marchers, they fell back and skirmishes spread to surrounding streets through the afternoon.

Venezuela protests Caracas
Venezuelan opposition activists clash with riot police during a protest against President Nicolas Maduro in CaracasJuan Barreto/AFP
Venezuela protests Caracas
An opposition activist throws a Molotov cocktail towards riot police in CaracasRonaldo Schemidt/AFP
Venezuela protests Caracas
A protester aims a slingshot during a protest march against President Nicolas MaduroJuan Barreto/AFP
Venezuela protests Caracas
Members of the National Guard prepare to fire tear gas towards protestersFederico Parra/AFP
Venezuela protests Caracas
Tear gas floats by as an opposition activist thows a stone at riot policeFederico Parra/AFP
Venezuela protests Caracas
An injured opposition activist is carried away on a motorcycle by fellow demonstratorsRonaldo Schemidt/AFP
Venezuela protests Caracas
An opposition supporter is detained by riot police in CaracasMarco Bello/Reuters
Venezuela protests Caracas
A member of the National Guard is silhouetted against clouds of tear gasCarlos Becerra/AFP
Venezuela protests Caracas
A protester throws a tear gas canister back towards the police in CaracasJuan Barreto/AFP
Venezuela protests Caracas
An opposition supporter wears a tear gas mask inside a mask of a donkeyCarlos Garcia Rawlins/Reuters
Venezuela protests Caracas
Opposition supporters use a chain to block a street in CaracasCarlos Garcia Rawlins/Reuters
Venezuela protests Caracas
Volunteer medics huddle together during clashes with security forces at a rally against Venezuela's President Nicolas Maduro in CaracasCarlos Garcia Rawlins/Reuters
Venezuela protests Caracas
Volunteers help an injured demonstrator during a rally against Venezuela's President Nicolas MaduroCarlos Garcia Rawlins/Reuters
Venezuela protests Caracas
An opposition supporter reacts to tear gas in CaracasChristian Veron/Reuters
Venezuela protests Caracas
Opposition supporters use a shield reading 'Justice' as they clash with security forces during a rally against Venezuela's President Nicolas MaduroCarlos Garcia Rawlins/Reuters
Venezuela protests Caracas
A protester wearing a Venezuelan flag throws a Molotov cocktail towards riot police in CaracasFederico Parra/AFP
Venezuela protests Caracas
Members of the National Guard crack down on opposition demonstrators during a march against President Nicolas MaduroFederico Parra/AFP
Venezuela protests Caracas
Members of the National Guard crack down on opposition demonstrators during a march against President Nicolas MaduroFederico Parra/AFP
Venezuela protests Caracas
A tear gas canister lies at the feet of riot police in CaracasJuan Barreto/AFP
Venezuela protests Caracas
Opposition activists make a barricade to block a street during a protest in CaracasRonaldo Schemidt/AFP
Venezuela protests Caracas
Venezuelan opposition leader and former presidential candidate Henrique Capriles takes part in a protest against President Nicolas Maduro in CaracasCarlos Becerra/AFP
Venezuela protests Caracas
A schoolgirl covers her nose and mouth to avoid breathing tear gas in CaracasRonaldo Schemidt/AFP
Venezuela protests Caracas
A journalist argues with riot police as opposition activists clash with police during a protest march in CaracasRonaldo Schemidt/AFP
Venezuela protests Caracas
A cameraman is detained by riot police during a rally against Venezuela's President Nicolas Maduro in CaracasCarlos Garcia Rawlins/Reuters
Venezuela protests Caracas
An opposition supporter participates in a rally against Venezuela's President Nicolas Maduro in CaracasChristian Veron/Reuters

Opposition leaders accuse Maduro of seizing dictatorial powers and unleashing repression on peaceful protesters, but the demonstrators also include groups of youths who provoke violence, hurling Molotov cocktails or burning and looting property.

The wave of protests since early April against socialist President Nicolas Maduro have sparked Venezuela's worst violence since 2014. Demonstrators want elections to end the socialists' two-decade rule, but the South American nation's brutal economic crisis is also fuelling anger. Maduro says his foes are seeking a violent coup, with US connivance, as in the short-lived 2002 putsch against Hugo Chavez.