Doctors in the central Argentine city of Cordoba say one person has been killed during a spate of lootings.
More than 60 people were injured when groups of people ransacked shops while police where on strike demanding higher wages and refused to go on patrol or leave police stations.
The 20-year-old was reportedly shot in the chest while travelling through the area on a motorbike.
Cordoba province Governor Jose Manuel de la Soto has asked the government for "urgent help" in containing the unrest.
Local media say gangs broke into a number of shops, including a motorcycle shop, supermarkets and shops selling mattresses and clothes.
Provincial police officers have refused to return to work unless their salaries are raised to 13,000 pesos (£1,285; $2,100) a month.
Argentina has recently seen a number of street protests against the economic policies of President Cristina Fernandez de Kirchner.