Mohammed Qahtan , the spokesman for the Joint Meeting Parties , Yemen 's largest opposition coalition , said `` the attack on the palace was preplanned by President Saleh to make people forget about the attacks that he has committed over the last two weeks . '' NEW : President Saleh has arrived in Riyadh for medical treatment , a source says . Comment: Vice President Abed Rabbo Mansour Hadi has taken over , a Yemeni official says . All the key players in Sanaa have agreed to an open-ended ceasefire , the source says .
NEW : President Saleh has arrived in Riyadh for medical treatment , a source says . Comment: Vice President Abed Rabbo Mansour Hadi has taken over , a Yemeni official says . All the key players in Sanaa have agreed to an open-ended ceasefire , the source says .