A group to Turkish historians have sent an open letter to Armenian President Robert Kocharian. The authors of the letter are concerned over the fate of Turkish scholar Yektan Turkyilmaz, taken into custody in Yerevan. «No one notified him in advance,» the message authors write, urging Armenian leaders not to exacerbate the already fragile Armenian-Turkish relations, reported Turkish Daily News. It should be reminded that Yerevan-Istanbul flight passenger - Turkish citizens Yektan Turkyilmaz - was taken into custody at Zvartnots Airport. A large lot of books of 17-20th centuries was found in his luggage and seized.