Supporters of Somalia’s President Mohamed Abdullahi Mohamed and those opposed to the extension of his four-year term clashed on Sunday on the streets of the capital, residents said. The president signed a law in mid-April extending his mandate for two years, stoking opposition inside Somalia and putting him on a collision course with Western and other donors opposed to the move. Somalia, which plunged into war and chaos in 1991, has been struggling to re-establish the authority of central government and rebuild the nation, with international help. The failure to hold elections that were due in February sparked a new crisis. “There is gunfire between pro-opposition military and government forces at Fagah Junction,” Halima Osman, a resident of Fagah in Mogadishu, said after Reuters witnesses...