Police in northern Greece are clearing makeshift migrant camps along the border with Macedonia after creating more shelter space to house stranded refugees and migrants.

Scores of riot police were deployed Monday as more than 400 Syrians and Iraqis were moved from a camp set up around a gas station near the Greek border with Macedonia and moved by bus to a shelter near the northern city of Thessaloniki.

Around 3,000 refugees and migrants remain camped at the border at three different sites, after authorities cleared a huge makeshift camp at Idomeni last month.

More than 50,000 migrants remain stranded in Greece follow European border closures and an agreement reached in March between the European Union and Turkey to deport newly arrived migrants traveling across the Aegean Sea.