Juba, Sha'ban 10, 1438, May 6, 2017, SPA -- At least 23 people were killed when unknown gunmen ambushed two passenger vehicles in South Sudan, an official said Saturday. About 17 others were wounded during the attacks, which took place Friday evening on a road linking the capital Juba with Bor, capital of eastern Jonglei state, the state's information minister, Akech Dengdit, told dpa. The gunmen first ambushed a Land Cruiser and killed 11 people, mostly civilians, according to Dengit.   Several hours later, 12 people were killed during an attack on a second vehicle, the minister said. The motive of the attacks was not immediately known. --SPA 15:03 LOCAL TIME 12:03 GMT www.spa.gov.sa/w394140