Lagos, Nigeria (CNN) Former sworn enemies Ethiopia and Eritrea Monday signed an agreement to end the war between the countries, according to Eritrea's Information Minister.

Yemane Meskel tweeted that the "state of war that existed between the two countries has come to an end."

Joint Declaration states, inter alia, i) State of war that existed between the two countries has come to an end. A new era of peace & friendship has been ushered; ii) Both countries will work to promote close cooperation in political, economic, social, cultural & security areas pic.twitter.com/B9arIZnsxa — Yemane G. Meskel (@hawelti) July 9, 2018

The minister added in the post that "a new era of peace and friendship has been ushered. Both countries will work to promote close cooperation in political, economic, social, cultural and security areas."

The declaration was signed Monday during an unprecedented summit between the leaders of the countries in Eritrea's capital, Asmara.

During a state dinner to welcome the Ethiopian delegation Sunday, Prime Minister Abiy Ahmed announced the two countries have agreed to reopen embassies and ports and allow flight operations to strengthen diplomatic ties between them, Meskel added.

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