The Peruvian government has declared a 30-day state of emergency in the Andean city of Abancay after demonstrators clashed with security forces.
Police used tear gas to disperse about 4,000 protesters, who were calling for the dismissal of the regional governor.
It is alleged that Rosa Suarez Aliaga was planning to transfer about $300,000 (£153,000) from state coffers to another city in the province.
Some 22 civilians and 63 police officers were injured, officials said.
The demonstrations forced businesses to close, the shutdown of transport services and the closure of the city's schools, Peruvian media reported.
"The government cannot allow these types of actions to continue so we have declared a 30 day state of emergency for the province of Abancay with the suspension of the individual liberties, and the inviolability of homes," Prime Minister Jorge del Castillo said.
"This means that any person can be detained without an arrest warrant if we suspect that this person could have been involved in the acts of violence that have already, sadly injured more than 13 people."