Xinhua world news summary at 1530 GMT, Sept. 24

ADEN, Yemen -- An explosion targeting a military ambulance in Yemen's southeastern province of Shabwa killed four soldiers loyal to the country's government on Sunday, a government official told Xinhua.

The local government source, who spoke on condition of anonymity, said the blast occurred when the military ambulance belonging to the Shabwa Defense Forces hit an explosive device while passing through the Musai