Mogadishu, Rajab 15, 1439, Apr 1, 2018, SPA -- Somalia's al-Shabab extremists on Sunday launched an attack on a base for African Union troops in country's south, killing four Ugandan peacekeepers, said Ugandan army spokesman Brig. Richard Karemire. Four others Ugandans were injured, Karemire told The Associated Press. At least 22 of the attackers were killed and the rest were repelled, he said. The attack started in the morning when two suicide car bombs exploded at the entrance to the heavily fortified base in Bulo-Marer, an agricultural town in Somalia's Lower Shabelle region, said Somali army Col. Ahmed Hassan. --SPA 21:14 LOCAL TIME 18:14 GMT www.spa.gov.sa/w656402