Doha - Turkish President Recep Tayyip Erdogan arrived in Doha on Monday as part of a Gulf tour aimed at defusing a dispute between Turkey's ally Qatar and neighbouring Arab states. Erdogan was greeted by Qatari ruler, Emir Sheikh Tamim bin Hamad Al-Thani in Doha ahead of their first face-to-face talks on the Gulf crisis, state news agency QNA reported. Turkey has sided with Qatar in the crisis, the worst to hit the region since the 1981 establishment of the six-nation Gulf Cooperation Council. On June 5, Saudi Arabia, the United Arab Emirates, Egypt and Bahrain suspended diplomatic and economic ties with Qatar over allegations that Doha supports extremist groups and terrorism. Qatar has denied the allegations.