Zeid Raad al-Hussein says the flood of refugees to Europe from places like Iraq, Syria and Afghanistan is "manageable" if the European bloc follows its own laws and principles.
In a statement Thursday, Zeid warned of the prospect of a "deeply problematic knock-on effect" elsewhere in the world if the EU "starts to circumvent international law."
Under the deal that took effect over the weekend, Greek authorities can detain and return newly arrived refugees to Turkey, and the EU will accelerate financial aid to Ankara.
U.N. agencies and international advocacy groups have already raised concerns about the deal.
UN refugee chief says EU deal breaks int`l laws
25 March 2016
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The U.N. human rights chief says the European Union`s deal with Turkey to send refugees and migrants back across the Aegean from Greece appears to contravene international human rights laws and standards.
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