A regional governor in northern Greece has called for a state of emergency to be imposed on the border with Macedonia as the migrant crisis grows.
Apostolos Tzitzikostas, governor of Greece’s Central Macedonia region, said the number of migrants on the frontier had grown to at least 13,000.
A state of emergency would facilitate aid supplies, Greek media report.
Earlier, the EU’s top migration official warned Greece could be “overwhelmed” by the crisis.
Dimitris Avromopoulos, the commissioner for migration, told the BBC other states needed to support his country.