President Recep Tayyip Erdoğan held a phone call with Saudi Crown Prince Mohammad bin Salman on Tuesday and discussed steps needed to bring light all aspects of the killing of journalist Jamal Khashoggi, presidential sources said, Daily Sabah reported.

The call was made on the request of the crown prince, the sources added. Salman was later due to address the Future Investment Initiative in Riyadh, a high-profile business event that has been overshadowed by the killing Khashoggi. International business leaders have pulled out from attending the summit.

In his speech at the Future Investment Initiative, the crown prince called Khashoggi's killing a "heinous crime that cannot be justified."