Slovenian police used pepper spray against people trying to cross from Harmica, Croatia
Migrants stranded in Croatia have been making renewed efforts to head north despite moves by Slovenia and Hungary to hold them back.Slovenian police used pepper spray on Friday night to disperse a group trying to cross from Croatia.
Hungary, meanwhile, accused Croatia of violating international law after asylum seekers were sent over the border without first being registered.
The EU, which is divided on the crisis, is to hold emergency talks next week.
Overnight, thousands of migrants trying to pass through the Balkans to reach northern EU states spent the night at railway stations or sleeping alongside roads.
As controls have got tighter, many migrants have strayed from transport routes, walking through cornfields to reach borders.
In a day of chaos and confusion on Friday, people were shunted from one border to another as governments remained split over how to handle the crisis.
The march by Europe's would-be immigrants is becoming a race against the changing political mood of its many nation state.
Each day now there are new routes and new rules marking the map of Europe - and without a pan-European solution, it is every nation for itself.