<div>Britain, France and Germany insisted that "light must be shed" on the where about of journalist Jamal Khashoggi as they called for a credible investigation into his disappearance. </div>''<div><br />''</div>''<div>In a joint statement issued in London, said whoever was responsible for the Saudi journalist's disappearance must be held to account.  </div>''<div><br />''</div>''<div>Khashoggi, a Washington Post contributor, vanished after entering the Saudi consulate in Istanbul on October 2 to obtain official documents for his upcoming marriage.</div>''<div></div>''<div>Meanwhile, PTI has reported that Turkey's President Recep Tayyip Erdogan and Saudi King Salman had discussed the issue over the telephone. </div>''<div><br />''</div>''<div>The two countries also agreed to set up a joint working group to discuss the missing of Khashoggi. <br />''</div>