A Yemeni probe into the assassination of Al Arabiya correspondent Mohammed Aydah in Mukalla has found that the Houthis have planned, funded and implemented the operation.Security sources said a Houthi official called Amjad Khaled helped train a cell accused of killing Aydah.For all the latest headlines follow our Google News channel online or via the app.According to Yemeni authorities, Khaled is also involved in several assassinations in areas liberated from the Houthis.Aydah was killed in June when an explosive device detonated in his vehicle in the city of Mukalla, in Hadramout governorate.