Italy's interior ministry says all migrants in the southern town of Riace, famous for welcoming them, must be transferred away, BBC reports.
The migrants will be moved to other migrant centres next week.
The move comes days after the arrest of the town's mayor, Domenico Lucano, over his alleged role organising "marriages of convenience" for immigration purposes.
He has been put under house arrest amid a national debate about integration.
His arrest follows months of tougher migration enforcement from Italy's populist government.