A Saudi general has disclosed that Egyptian President Abdel Fattah al-Sisi had proposed sending up to 40 thousand Egyptian ground forces to Yemen to fight with the Saudi-led Arab coalition against the Houthi rebels.
"The crash resulted in the martyrdom of four officers and eight rank officers of the Saudi armed forces", the coalition said in a statement submitted to the Saudi Press Agency.
Yemen's long-running conflict escalated in March 2015 when a Saudi-led coalition began bombing raids against the Huthis who had stormed the capital and taken swathes of central and northern territory.
Dozens of Saudi soldiers have been killed in cross-border attacks from Yemen.
Meantime, an informed military source said that the Yemeni army and popular forces targeted the gathering centers of the Saudi-backed militias in al-Mukha region, killing at least 15 pro-Hadi militants, including several senior commanders.
"It shows why we are working so closely right now with the Chinese... to try to get this under control and aim for the denuclearized Korean peninsula", Mattis told reporters aboard his doomsday plane in route to Saudi Arabia.
"The percentage of renewable energy by 2023 will represent 10 percent of the total electricity of the kingdom", he said at the start of the Saudi Arabia Renewable Energy Investment Forum.
The U.S. security alliance with Saudi Arabia, dating to 1944 and based largely on the Saudis' oil riches, has made Washington the kingdom's most important arms supplier.
During the trip, Mattis will meet with King Salman bin Abdulaziz Al Saud, as well as the defense minister, Prince Mohammed Bin Salman Al Saud, and the interior minister, deputy crown prince Mohammed Bin Nayef.
Seven ceasefires brokered between government and rebel forces by the United Nations have failed while U.N. -backed peace talks have repeatedly broken down.
"The Egyptian military is now taking part with naval and aerial forces but at that time we were talking about around 30 to 40 thousand ground troops", the spokesman for the Saudi-led coalition went on to say.
Mukha has been the scene of fierce fighting between Yemeni troops and Saudi mercenaries over the past weeks.