The Latest on Europe's migration crisis (all times local):

6:55 p.m.

The last migrants stranded at the border between Macedonia and Serbia have accepted transfers to centers in Macedonia's north and south.

The 237 migrants left their tents in a muddy field. Some were sent to a transit center in the nearby town of Tabanovce and the rest to a center in Gevgelija, close to the border with Greece.

But Ljubinka Brasnarska, an official with UNHCR, the United Nations' refugee agency, told the Associated Press that the Tabanovce center is already operating at twice its capacity. The official decried the bad conditions there, saying children have been sleeping on blankets on the ground for weeks.

About 1,200 migrants have been stranded in Macedonia since Balkan countries closed their borders to refugees heading further north into Europe.

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4 p.m.

Albanian authorities have returned to Greece six Syrians who had illegally crossed the border.

Police said Saturday they arrested a 47-year old Albanian who had assisted the Syrians to cross in a mountainous area near Gjirokastra, 250 kilometers (155 miles) south of Tirana, for 300 euros ($335) each.

The Albanian is charged with assistance to illegal border crossing, which is punishable by up to seven years' imprisonment.

Albania is cooperating with Italy and European agencies to get ready for a possible flow of migrants, though it hasn't been a transit route so far.

Tirana has said it will neither open the border nor build a wall, calling for a joint European effort if the refugees' route turns to the tiny Western Balkan country.