Thousands of migrants gather on Turkey-Greece border

Migrants gather inside the buffer zone of the Turkey-Greece border, at Pazarkule.

The United Nations migration organization said that at least 13,000 people were massed on Turkey's land border with Greece, after Turkey officially declared its western borders were open to migrants and refugees hoping to head into the European Union.

Migrants walk on railways toward Meritsa river, near Edirne, to take a boat to attempt to enter Greece by crossing the river.

Turkey will no longer close its border gates to refugees who want to go to Europe

Migrants walk towards the Greek border in Pazarkule.

Thousands more migrants reached the Turkish border with Greece after President threatened to let them cross into Europe.

The United Nations migration organization said that at least 13,000 people were massed on Turkey's land border with Greece, after Turkey officially declared its western borders were open to migrants and refugees hoping to head into the European Union.

A migrant carries his belongings as he walks toward Meritsa river, near Edirne, to take a boat to attempt to enter Greece by crossing the river.

Migrants walk towards the Turkey's Pazarkule border crossing with Greece's Kastanies.

Turkey's President Recep Tayyip Erdogan said his country's borders with Europe were open Saturday, making good on a longstanding threat to let refugees into the continent as thousands of migrants gathered at the frontier with Greece.

A boy stands next to a tree as migrants in the background camp awaiting to cross the border, at Turkey's Pazarkule with Greece's Kastanies.

Migrants wait at the buffer zone at Turkey-Greece border at Pazarkule.

Migrants walk towards Greece along the Turkey-Greece border near Pazarkule.