Macedonia has stepped up security on its border with Greece, blocking thousands of migrants from entering.

The government said Thursday it is proclaiming a state of emergency on its borders and deploying additional troops as it tries to stem a recent migrant surge.

Thousands of migrants were stranded Thursday on no-man's land between Macedonia and Greece near the Macedonian town of Gevgelija, from where they planned to catch trains that would take them to the Serbian border on their way to EU-member Hungary.

Macedonia has become is a major transit route for the migrants heading from Greece to more prosperous EU countries. Almost 39,000 migrants, most of them Syrians, have been registered passing through the impoverished Balkan country over the past month, double than the month before.