Hamas chief Khaled Meshaal has arrived in Turkey, the NTV news channel reported Wednesday, a day after Palestinian leader Mahmud Abbas began a four-day visit.
Meshaal was currently in Istanbul, NTV said, adding that it was not immediately clear whether he would meet with Abbas.
Turkish foreign ministry officials contacted by AFP would not comment.
Abbas arrived in Ankara Tuesday afternoon as Palestinian officials reported disagreements between his Fatah faction and Hamas over the formation of a unity government.
Turkish officials said Abbas would have a "private programme" before talks on Thursday and Friday with President Abdullah Gul, Prime Minister Recep Tayyip Erdogan and Foreign Minister Ahmet Davutoglu.