Nearly 200 workers then began a strike on Friday, he said, requesting not to be named for fear of backlash.
Thousands of African asylum seekers and their local supporters protest against an Israeli plan to deport them.
Greece begins a process of returning migrants to Turkey under an EU deal, despite fears over lack of preparation and criticism from campaigners.
Nearly 200 workers then began a strike on Friday, he said, requesting not to be named for fear of backlash.
Thousands of African asylum seekers and their local supporters protest against an Israeli plan to deport them.
Greece begins a process of returning migrants to Turkey under an EU deal, despite fears over lack of preparation and criticism from campaigners.
