Croatia will "force" Hungary to accept migrants by continuing to send them to the border, its prime minister says.

Zoran Milanovic's statement was the latest in an increasingly bad-tempered exchange of views over how to handle the migrant influx.

Hungary has accused Croatia of breaking international law by not registering migrants - one minister reportedly calling Mr Milanovic "pathetic".

Croatia says more than 20,000 migrants have entered since Wednesday.

Some 8,000 passed into Hungary on Friday, the Hungarian authorities said. New busloads arrived at the Beremend border crossing on Saturday, with the migrants offloaded and transferred to Hungarian buses.

Hungary is then transporting the migrants to Austria. Austrian police said 6,700 had crossed since midnight, 4,200 at Heiligenkreuz, near the city of Graz, and the remainder at Nickelsdorf near Vienna.

Croatia's response has typified the EU confusion over how to handle the crisis - migrants were initially welcomed to travel through the country, but then borders were hastily closed to regulate the flow as the government said numbers had become untenable.

In Hungary, migrants have at times been met with tear gas and water cannon as they try to push their way north. In Slovenia police used pepper spray on one group.

Most of the migrants, many fleeing war and poverty in the Middle East and Africa, want to go to Germany or the Scandinavian countries.

The EU is to hold emergency talks next week.

BBC