Journalists saw demonstrators throwing several flaming objects which erupted into flames on the street towards the heavily-guarded embassy in Athens.
Scores of refugees staying at the hotel, which is supervised by the International Organisation for Migration, had tested positive for Covid-19, news reports said.
The country had taken "some positive measures" following a 2015 investigation, the Council of Europe said, but a delegation that visited last year found that degrading treatment of prisoners by police remained a "frequent practice throughout Greece".
Demonstrators at Evangelismos hospital in central Athens held up signs demanding more hiring, virus testing and hospital equipment and were dispersed by the police. A similar protest was held at the main hospital in Larissa in central Greece.
"We will come together in Istanbul next Tuesday" with German Chancellor Merkel and French President Macron, Turkey's President Erdogan says, adding British PM Johnson could join as well.
Thousands of people in Athens protested against the European Union’s refugee policy, marching in solidarity with migrants and refugees who have been blocked at the Greece border from entering the EU territories.
Some hoping to reunite with their relatives, some dreaming of well-paying jobs, each Syrian refugee TRT World spoke with at the Turkish-Greek border has a reason to take refuge in Europe.
Greece has a historically low number of women in senior positions in politics. In the current Greek Cabinet, all but one of the 18 senior positions are held by men.
Warlord Khalifa Haftar's visit comes as world powers step up efforts for a lasting ceasefire, nine months after Haftar's militia launched an assault on the Libyan capital Tripoli.
US President refuses to endorse bill, which angered Turkey, and exposed rifts between the White House and US lawmakers.
In the Greek capital of Athens, police armed with tear gas and clubs have faced off with protesters sometimes armed with rocks and molotov cocktails in recent weeks.
Turkish media identified the man as 39-year-old Mohammad Darwis B and said he was an American citizen of Jordanian background. The US agreed to take him in and to provide him with travel documents.
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