Fence construction at Hungarian-Serbian border. (Photo: MTI/Sándor Újvári)

The weak point in the fence at the moment is the stretch of track between the Hungarian reception center at Röszke and the Serbian border town of Horgoš, according the report, but fencing off the track could be complex.

As proposed, the area of fence that crosses the track would require a constant guard, and every time a train uses the line, the fence would need to be opened, thus allowing refugees to enter at the most dangerous time, when a train is approaching, index.hu reported. Another complication would be the need to close the fence once the train has passed, the daily added.

Hungarian Prime Minister Viktor Orbán paid a visit to the Hungarian-Serbian border to inspect the border fence yesterday evening and put forward an order to speed up the construction, according to reports.