Moscow police rounded up and arrested more than a thousand migrant workers at a vegetable warehouse on Monday morning, hours after hundreds of ultranationalists clashed with riot police. The rioters had overturned cars and raided a shopping centre used by migrants after the murder of an ethnic Russian was blamed on a man from the Caucasus. Police arrested more than 1,200 people in what was called a "pre-emptive raid" on the warehouse where the rioters believed the killer worked, Russian news agencies reported.
Sunday's rioting in the southern Biryulyovo district of Moscow, which escalated after hundreds gathered where Egor Shcherbakov, 25, was murdered last week, marked the capital's worst nationalist unrest in three years.