The UN Refugee Agency said, on Friday, it was "shocked and deeply distressed" by reports that 19 migrants died on Wednesday on the Greek-Turkish border, Anadolu News Agency reports.
"We have seen reports in the media. And we are shocked and deeply distressed by these reports," UN High Commission for Refugees spokesman, Boris Cheshirkov, told a news conference.
He said they have reports that people have died near the border between Greece and Turkiye.
"We are working to verify these reports," he said, in reply to a question from Anadolu Agency.
According to Cheshirkov, the UN agency has received reports of an increase in the number of human rights violations at land and sea borders during the last two years.
"Such tragic deaths are avoidable, including through the establishment of regular and safe pathways that could prevent people from resorting to smugglers," said the UN official.
"Increasing border restrictions and pushbacks in Europe contribute to refugees and migrants using riskier routes. And it means that people are putting themselves, their lives and their children at greater risk," he added.
Turkiye's Interior Minister, Suleyman Soylu, heavily criticised Greece on Wednesday for the inhuman and degrading treatment of irregular migrants and said those who were found dead were stripped of their clothes and shoes by the Greek border guards.
At least 19 irregular migrants were found frozen to death, the Turkish authorities said on Thursday, raising the death toll from 12, a day earlier.