German weekly Der Spiegel published video footage Thursday showing masked Greek law enforcement officers forcibly sending dozens of refugees to an area in Turkey near its border.

Two masked men wearing camouflage suits were seen putting refugees on a small boat, crossing the Meric River and forcing them to land on Turkish soil.

Several retired and serving Greek police officers and soldiers confirmed to reporters they have been conducting “pushbacks” at the Greek-Turkish border for years, according to Der Spiegel.

Denying entry to asylum seekers and forcibly returning them is illegal under EU law and a violation of international

Read more: Greece’s illegal ‘pushback’ of refugees caught on video