A fire which broke out during a stormy protest inside the refugee and migrant hotspot of Moria on Lesvos island on Monday afternoon, has been extinguished and order has been restored, local authorities told Xinhua.

No injuries were reported, but at least five container units and three tents were destroyed, according to sources.

The unrest started when a group of migrants protested against the conditions for detainees due to be returned to Turkey and the rejection of an asylum bid, according to the same sources. The number of protesters has yet to be clarified.

The case causing the tensions concerned a Haitian national and mostly African migrants. Protesters pelted rocks at the pre-departure center at the camp and set tents on fire, Greek national news agency AMNA reported.

Police intervened with tear gas to disperse the crowd and restore order, as protesters were blocking the fire brigade's attempts to enter the compound and put out the fires, according to the report.

By sunset, firefighters had extinguished the flames.

During the riot, hundreds of refugees, mainly families with children, had left the camp, AMNA reported.

Moria's hotspot houses hundreds of refugees and migrants who have reached Greece since the EU-Turkey agreement of March 2016, which aimed to stem the refugee-migrant flows into Europe.

Refugees and migrants are hosted in Moria until their cases are assessed. Those who are not granted asylum are returned to Turkey, under last year's deal.

Currently, approximately 3,000 migrants and refugees are being hosted on Lesvos island and some 14,000 in all of the Aegean Sea islands, according to local authorities and official data released earlier on Monday by the Greek Ministry of Migration Policy in Athens.

More than 60,000 people have been stranded in Greece and are hosted in accommodation centers and apartments throughout the country, according to the official estimates.

More than one million people landed on Greek shores, crossing the Aegean Sea from Turkey and continuing their perilous journey to central Europe, before the closure of the Balkan corridor.

Although the living conditions of refugees and migrants have improved over the past year, and the number of arrivals has dramatically dropped after the implementation of the EU-Turkey agreement, there are still problems to be addressed in overcrowded centers on the Aegean Sea islands, such as Lesvos, according to officials.

Refugees and migrants complain about delays in the evaluation process of their bids.

According to figures released on June 20 by the Greek migration policy ministry on the occasion of World Refugee Day, since 2015, a total of 87,939 asylum requests have been assessed in Greece.

More than 2,000 individuals have been sent back to Turkey from Greece or willingly repatriated since the start of the EU-Turkey agreement, according to data released by Greece's Public Order ministry.

In recent months, protests in refugee camps have receded. Residents of Moria camp in particular have held many protests regarding living conditions. Last September, a large section of the hotspot was destroyed by fire during another stormy protest.