Walking the migrant trail through Hungary

The German government has announced it is bringing back border controls with Austria, after more than 13,000 migrants arrived in Munich on Saturday.

Hungary is also preparing to introduce tougher measures this week to halt the flow of people passing through the country.

A four-metre-high (13ft) fence along the Hungarian/ Serbian border is being built, and from 15 September illegal immigrants will be arrested.

James Reynolds reports from Hungary.