More EU countries have said they are imposing border checks to deal with an influx of migrants.

Austria, Slovakia and the Netherlands said they would tighten controls, hours after Germany imposed checks on its border with Austria. It came as EU interior ministers held emergency talks in Brussels. Hungary also completed a fence along its border with Serbia on Monday, and blocked a railway line used as the main crossing point by migrants. A container wagon, with one end covered in razor wire, was rolled along the track to plug the gap in the fence near the town of Roszke. Migrants were directed to an official registration point. Hungary is due to enforce tougher measures from midnight, including arresting illegal immigrants, and Prime Minister Viktor Orban told Hungary's TV2 a state of emergency was "likely" to be introduced in the border area.
The new border checks further north are a challenge to the EU's Schengen agreement on free movement, although the rules do allow for temporary controls in emergencies.

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