The European Union will create a common set of procedures for migrant deportations. It has also proposed to create "return hubs" as part of a controversial plan to deport rejected asylum seekers to third countries.
People need to keep in mind these are rejected asylum seekers. Their application has been processed and denied. These are not all legitimate refugees, and especially not those with an ongoing asylum application. Normally these rejected asylum seekers would be put in jail pending their deportation but due to the fact that
we have more of them than we have free space in our jails,
many don't have valid papers for whatever reason and
often come from countries that try to extort the deporting countries for taking back their own citizens
the temporary detention term ("Abschiebehaft" and "Vorbereitungshaft" in DACH countries) has simply often not been applied. Many of these rejected asylum seekers then end up absconding. It may sound harsh but Denmark has been doing these deportation hubs for many years already and they're highly effective.