Yemen’s Iran-aligned Houthis will release Mohammed Qahtan, leader of the Islah party, under a deal reached with the Saudi-backed government in Aden, top Houthi negotiator Abdul Qadir Al-Murtada told Reuters on Wednesday. The Houthis have not confirmed if Qahtan is dead or alive, a government negotiator, who did not want to be named, told Reuters. Qahtan, whose Islah party is a powerful member of the Saudi-backed government, was detained by the Houthis in 2015. His family said they have not been permitted to visit him and they do not know where he has been held. If Qahtan is dead, his body will…