Violence at a rally in Peru's capital on Wednesday left one dead and dozens injured, said President Jose Jeri, whose accession days ago has failed to stamp out angry protests against the country's political class.

Youth-led demonstrations brought thousands of Peruvians to the streets in Lima and several other cities, frustrated by the authorities' failure to resolve a worsening crime crisis.

"Update: 55 police officers injured" and "20 civilians injured," Jeri said on social media, updating earlier figures from the clashes near Congress in central Lima.

Minutes later, the president announced that one person had died during the protests.

Mass protests

The South American country has been rocked by protests for weeks, and lawmakers voted on Friday to impeach then-president Dina Boluarte, blamed by critics for the crisis.

Jeri, a right-wing politician who had served as leader of Congress, became interim president until elections in April.

Wednesday's protests were called by a youth-led collective, artists' groups and labour unions.

As night fell, some protesters tried to breach the security barrier around Congress, an AFP correspondent said. Some in the crowd also hurled stones and lit fireworks.

Police in riot gear responded with tear gas.

"I think there is general discontent because nothing has been done," 49-year-old freelancer Amanda Meza told AFP while marching toward Congress.

"There's no security from the state," she said.

"Extortion, murders... have grown massively in Peru."

Impeaching Boluarte

Boluarte's impeachment followed protests by bus companies, merchants and students over shakedowns by criminal gangs — and attacks on those who refuse to pay protection money.

Extortion and contract killings have been a feature of daily life across the South American country.

Gangs like Los Pulpos and Venezuela's Tren de Aragua, which operates across Latin America, hold people from all walks of life for ransom.

Jeri has attempted to take the heat out of the protests by vowing to "declare war" on organised crime.

A Peruvian judge, separately, on Wednesday rejected a bid to prevent former President Dina Boluarte, who Congress abruptly ousted last week, from leaving the country while state prosecutors investigate her for alleged abuse of office and money laundering.

Boluarte, one of the world's least popular leaders, left office with approval ratings ranging between two to four percent amid growing unrest over insecurity, as transport workers and young people protested rising extortions and murders.

Boluarte, who faces a series of criminal accusations, has denied wrongdoing.