In addition it seeks to end the armed conflict and create an anti-narcotic strategy.

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The third step would be the signing of an agreement to "put an end to armed conflict", Mr de la Calle said, adding that the final agreement would be "put to the public".

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Referring to the ELN, Mr Santos said that if the group was serious about an end to the armed conflict, it too could be part of peace talks.

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The talks aim to end five decades of an armed conflict that has killed an estimated 600, 000 people in Colombia.

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Turkey's aims to become a leading power in the Middle East - and eventually in Europe mean it must end its 30-year armed conflict with Kurdish rebels, our correspondent adds.

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