Austria says it is deploying troops to help deal with a migrant influx, and will tighten controls on its border with Hungary.

Germany is to introduce some form of border controls with Austria, German and Austrian media report, as thousands more migrants arrive this weekend.

Austria says it is planning to phase out special measures that have allowed thousands of migrants to travel freely from Hungary to Western Europe.

A convoy of cars driven by German and Austrian activists crosses into Hungary to pick up migrants and help them reach western Europe.

Hundreds of migrants have resumed their journey through Austria to Germany after Hungary's decision on Friday to let them through.

Around 2,000 refugees have arrived at Austria's border from Hungary, and the numbers could more than double through the day, Austrian police say.

EU nations must accept up to 200,000 refugees as part of a "common strategy" to replace their "piecemeal" approach to the migrant crisis, the UN says.

Hundreds of migrants break out of a Hungarian border camp and others set off on foot from Budapest as authorities scrambled to contain a migrant crisis that has brought Europe's asylum system to breaking point.

Police in Austria say three Syrian children and their families who were rescued from a minivan containing 26 migrants have disappeared from the hospital where they were being treated.

The Austrian authorities say at least 20 migrants have been found dead in a lorry in the eastern province of Burgenland.