Ecuadorean authorities have begun arresting shopkeepers for raising food prices as indigenous groups clashed with security forces on Sunday in a fourth day of protests against President Lenin Moreno’s austerity measures. Ecuadoreans complain consumer prices have risen sharply as a knock-on effect of Moreno’s abolition of fuel subsidies, which has also triggered the nation’s worst unrest in more than a decade. The government said 20 people were detained over the weekend for over-charging for products including corn, onions, carrots and potatoes, which are all subject to price controls.