Iran Press/ America: In the capital Lima, police officers used tear gas to repel demonstrators throwing glass bottles and stones, as fires burned in the streets, local TV footage showed.
In the country's southern Puno region, some 1,500 protesters attacked a police station in the town of Ilave, Interior Minister Vicente Romero said in a statement to news media.
A police station in Zepita, Puno, was also on fire, Romero said.
By late afternoon, 58 people had been injured nationwide in demonstrations, according to a report from Peru's ombudsman.
The unrest followed a day of turmoil in Thursday, when one of Lima's most historic buildings burned to the ground, as President Dina Boluarte vowed to get tougher on "vandals."
The destruction of the building, a near-century-old mansion in central Lima, was described by officials as the loss of a "monumental asset." Authorities are investigating the causes.
Romero on Friday claimed the blaze was "duly planned and arranged."
Thousands of protesters descended on Lima this week calling for change and were angered by the protests' mounting death toll, which officially stood at 45 on Friday.
Protests have rocked Peru since President Pedro Castillo was ousted in December after he attempted to dissolve the legislature to prevent an impeachment vote.
The unrest has until this week been concentrated in Peru's south.
The government has extended a state of emergency to six regions, curtailing some civil rights.
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