South Sudan’s leaders announced on Thursday that the country’s post-war transitional government would remain in power two years beyond an agreed deadline, in a move foreign partners warned lacked legitimacy. Martin Elia Lomuro, South Sudan’s minister of cabinet affairs, said the decision was taken “to address the challenges that impede the implementation of the peace agreement”, following a 2018 deal to end a five-year civil war that left nearly 400,000 people dead. “Thus a new roadmap has been agreed,” the minister said, speaking in the presence of President Salva Kiir and Vice President Riek…