Turkish Prime Minister Recep Tayyip Erdogan arrived in Beirut on Wednesday to meet political leaders amid reports that the promised return of Arab League Secretary-General Amr Moussa to resume mediation here will not take place unless rival Lebanese camps show "flexibility" in their stands. Erdogan's one-day visit would include meetings with President Emile Lahoud, Prime Minister Fouad Saniora, Parliament Speaker Nabih Berri and parliamentary majority leader Saad Hariri.