The first official visit by a Turkish president to Greece for six decades got off to a tense start Thursday, with Recep Tayyip Erdogan repeating comments that have alarmed his Greek hosts about the need to update the 1923 Treaty of Lausanne that delineated the borders of modern Turkey, among other issues.

Erdogans first meeting was with Greek President Prokopis Pavlopoulos, and the televised discussions between the two men, usually reserved for pleasantries and formalities before closed-door talks, were visibly awkward.

The presidents engaged in a thinly-veiled verbal spat over the Muslim minority in northeastern Greece and the treaty. Pavlopoulos, whose role is mainly ceremonial, reminded Erdogan that unlike his visitor, he was not head of government and therefore did not have the same powers as Erdogan.

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Turkeys President Recep Tayyip Erdogan reviews the Presidential Guard with Greeces President Prokopis Pavlopoulos, during the welcome ceremony in Athens, Thursday, Dec. 7, 2017. Erdogan arrived in Athens Thursday for a two-day official visit, the first official visit by a Turkish president in decades, with Greece hoping the trip will help improve often frosty ties with its neighbour. (AP Photo/Thanassis Stavrakis) The Associated Press

Erdogans two-day visit to Greece will include a trip to northeastern Greece Friday to meet with the countrys Muslim minority....