Turkish President Recep Tayyip Erdogan will this month visit Qatar and Saudi Arabia, which are locked in a deep diplomatic crisis, his office announced today. <br/><br/>Erdogan will also visit Kuwait, the main mediator in the Qatar crisis, during his July 23-24 tour. Turkey is a key ally of Qatar, which has been diplomatically and economically isolated by its Gulf neighbours over allegations it supports terrorism. <br/><br/>Saudi Arabia, the United Arab Emirates, Egypt and Bahrain last month cut diplomatic ties with Qatar and issued 13 wide-ranging demands to lift the blockade, including the closure of a Turkish military base in the emirate.