BBC News this afternoon:
The completion of a fence on the Bulgaria-Turkey border has seen people adopting different methods to get into Europe, according to the BBC's Eastern European correspondent Nick Thorpe.
"Most asylum seekers trying to reach Western Europe do so hidden in trucks," he says.
"One part of the smugglers' network hands them on to others. They are then kept in 'safe' houses in Bulgaria, usually close to the Serbian or Romanian borders, to be put into new trucks bound for Western Europe.
"Since 2016, there have been fewer and fewer ways to enter Western Europe legally - hence the desperation of those on the road."