Migrants clash with security forces due to overcrowding in refugee camps along the Greek-Turkish border.

Poor living conditions and overcrowding in Greek refugee camps have led to protests between migrants and security forces over the past few days. The conflict erupted into violence when protesters threw bricks at the police and demanded for their release, while security forces fired tear gas at the crowd.

Moria, one of the most overcrowded refugee camps in Europe, can accommodate only 2,840 people but is hosting more than 19,000 people. That makes this place a hot spot in the conflict between Greek officials and migrants.

One protester held up the sign with the words "we are not prisoners", while another person carried the slogan "Bad Moria".

Greece has declared a state of maximum alert aimed at border guards, has said it has blocked nearly 10,000 people on the border with Turkey and stopped reviewing applications for asylum of unauthorized immigrants. "We have seen a significant increase in the number of candidates over the past few days, from 200-300 people per day to 500-800," said Manos Logothetis, Greek immigration official.

Large numbers of migrants have sought entry into Greece since Turkey announced it would "open the door" to the influx of people from Syria into Europe in order to put pressure on the European Union (EU). Ankara said it had been able to accommodate more than 4 million refugees from Syria, Afghanistan and elsewhere, and criticized the EU for not supporting a military operation in Syria.

Migrants are a sensitive issue in Europe, especially when Greece faced more than one million people who flocked to the country in 2015. Many EU members were then forced to accept part of the migration, causing This topic is fully utilized by anti-EU and anti-refugees.