Hundreds of migrants were seen boarding a passenger ship in the port city of Mytilene, on the Greek island of Lesbos on Monday, as part of government efforts to tackle overcrowding in the island's migrant camp.

Moria, Europe's largest migrant camp located on Lesbos, reportedly hosts more than 11,000 people, which is almost four times its capacity.

A total of 1,500 people are expected to be moved to northern Greece by the end of the day, with the first ship carrying 635 migrants setting sail in the morning and the second vessel carrying around 900 people departing in the evening.

The transfer is part of government measures announced late last week, following a recent spike of migrant arrivals on Lesbos.

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