France refused entry to a bus carrying North African migrants from Italy . Tunisians had been granted visa by Italy , allowing them to enter France . Italian foreign minister estimates 300,000 migrants could leave country . The Italian and French governments were both trying to defuse an escalating diplomatic row Monday after France refused entry to a train carrying North African migrants from Italy . Schengen agreement allows migrants to travel freely between 25 European .
France refused entry to a bus carrying North African migrants from Italy . Tunisians had been granted visa by Italy , allowing them to enter France . Italian foreign minister estimates 300,000 migrants could leave country . Schengen agreement allows migrants to travel freely between 25 European .