In pictures: Migrants seek new routes

Tens of thousands of migrants are on the move across the Balkans as they seek to find refuge and apply for asylum in Germany, Austria, Sweden and other western European countries.

Many are stranded or caught in bottlenecks as different countries in the region try to cope with the influx.

Turkey has tried to stem the tide of migrants heading for Greece by limiting bus tickets to border areas, prompting this protest at Istanbul bus station.

Closer to the border, a Syrian toddler plays in front of Turkish police preventing migrants from crossing to Greece.

At the other end of Greece at the Macedonian border, migrants board a train bound for Serbia.

In northern Serbia, people are walking through fields to avoid road border crossings into Croatia after Friday's closure of all but one crossing point.

A huge influx of migrants into Croatia in recent days follows new security measures by Hungary, including the building of a fence along its border with Serbia. Croatia says it cannot cope with the numbers and has promised to move migrants on to neighbouring countries.

Many are stranded near the Serbian border, waiting for trains and buses to take them to Hungary and Slovenia.

A scene on Croatia's border with Slovenia, after Slovenian police used pepper spray on migrants. Slovenia has accused Croatia of "intentional participation in people smuggling" after it failed to register migrants.

Hungary has escorted hundreds of people - many brought to its borders by Croatia - to its border with Austria. More than 6,000 migrants have arrived in Austria since midnight on Friday.

Once in Austria many migrants take the opportunity to charge their mobile phones.