Reliable sources in Marib city revealed to Al-Sabah Al-Yemeni on the arrival of an investigation commission to Tadawin camp this morning due to the crushes of Saudi Black Hawak. The possible cause of the crash is under investigation now, with the team of Patriot system. The accusation points to the UAE forces who stationing in the camp. A state of mistrust prevails between the coalition forces and UAE forces in Marib city. While, the coalition forces and Hadi government offered their sympathy and condolences to the Saudi leadership.