Authorities in Greece have halted deportations to Turkey just one day after a controversial deal with the European Union came into force.
Many of the migrants and refugees detained on the Greek islands have applied for asylum, meaning they should not be sent back.
Human Rights Watch says the deal is treating refugees as human trash.
Inside Moria Refugee Camp on the Greek island of Lesbos, refugees and migrants stage a peaceful protest.
They are holding signs asking for freedom and they are chanting that they do not want to go toTurkey.
This was to be the week migrants who had not applied for asylum were to begin being deported from Greece to Turkey under an agreement between Turkey and the European Union.
And, indeed, as Monday arrived in Greece, 220 people were, indeed, removed and taken to Turkey.
Under the pact, all those who arrived in Greece on or after March the 20th are to be sent back unless they qualify for asylum.
And for every Syrian returned, another Syrian is to be resettled in an EU country.
But after one day, the deportations appear to have come to a halt, amid a sudden increase in asylum claims that is reducing the number of those eligible for deportation.
Almost all of the 3,000 people in the Moria camp have now made asylum applications, and there are reports officials "forgot" to process the claims of 13 who were sent back.
The processing of claims is expected to start tomorrow, meaning it could be over a week before Greek authorities resume deportations.
Human Rights Watch says its team has not been given access to people inside the camp.
The rights organisation's Germany director, Wenzel Michalski, says the deal is fundamentally flawed.
"We don't have access into the camp, so we are not even allowed to talk to the refugees, so the question is, 'Why don't they grant us any access? What do they have to hide?' The EU and Greece are doing something really disturbing and illegal, and they're just treating refugees as human trash which should be just cleaned away. And this is a tragic development."
The rights organisation Amnesty International has also criticised the EU-Turkey deal and has expressed concern now that the sceening of asylum seekers will be rushed.
The group's director in Greece, Girogos Kosmopoulos, says people need to have a chance to have their cases heard fairly and effectively.
"Until that thing happens, and especially if we are speaking about refugees, Turkey is not a safe country. There's no legal guarantees. There are no guarantees in practice that they will receive international protection according to the international standards. And this will not take place."
Many Syrians are already living in Turkey after failing to reach Greece via boat.
Nour Ogha and her family fled violence in Syria three months ago and say they are uncertain about their future in Turkey.
"I want to go to Germany, or America, Canada -- anywhere, but not here, Turkey. I don't know what I have to do now. I'm so confused. Maybe I will sleep in the street. I don't have no ... I don't have a place to go. I don't have a home."
Pope Francis is reportedly considering a trip to Lesbos to highlight the difficulties of those caught in Europe's humanitarian crisis.
