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

4:15 p.m.

Albanian police say they have detained 19 Afghans and arrested one suspected Albanian smuggler trying to illegally help them cross into neighboring Montenegro to reach Western European countries.

The police statement on Sunday said another Albanian organizing the smuggling was still at large.

The Afghans were found a day earlier hidden in a forest in northern Shkodra getting ready to cross the border into Montenegro on foot. Authorities have started repatriating them, said police, without identifying the country they came from — Greece, Macedonia or Kosovo.

The arrested Albanian could face up to ten years in jail term if found guilty.

Albania hasn't been a major transit route for migrants through Europe so far.

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1:15 p.m.

Migrants and asylum-seekers who set off two days ago on a protest march toward the border with Hungary have traveled part of the route by train before proceeding on foot to seek entry into the European Union, the Serbian authorities said Sunday.

The several dozen people arrived on a morning train in the northern town of Subotica and resumed walking from there, said Ivan Miskovic from the Serbian government refugee agency. Subotica is 10 kilometers (6 miles) from the border.

Some 300 young men and boys started marching Friday from Belgrade toward the Hungarian border, 200 kilometers (120 miles) away, to protest Hungary's decision to keep its border closed for most asylum-seekers, which has left several thousand stranded in Serbia.

Faced with scorching heat, many have given up along the way, while others kept towels or blankets on their heads to protect themselves from the sun.

Hungary has recently strengthened anti-migrant controls on its southern border with Serbia. Hundreds of migrants have been staying in makeshift camps along the border with almost no facilities.