Refugees and migrants try to break down the border fence between Greece and Macedonia near the makeshift camp at the Greek-Macedonian border near the village of Idomeni, on April 16, 2016.
According to statistics released on on April 8 by the International Organization of Migrants (IOM), more than 152,000 people have arrived in Greece by sea from Turkey since January 1, nearly three-quarters of whom were Syrians. Greek Prime Minister Alexis Tsipras accused neighbouring Macedonia on April 11, 2016 of 'shaming' Europe by firing tear gas and rubber bullets at migrants desperately trying to break through a border fence. Tensions are still running high after April 10's violence, which saw 250 refugees and migrants hurt at the flashpoint Idomeni crossing as they tried to force their way into Macedonia.
 / AFP / DANIEL MIHAILESCU        (Photo credit should read DANIEL MIHAILESCU/AFP/Getty Images)