UNITED NATIONS (AP) — Political deadlock in South Sudan is sharply escalating violence, putting the world’s newest nation on a “dangerous precipice,” the United Nations’ peacekeeping chief warned Tuesday. Jean-Pierre Lacroix urged the U.N. Security Council and the broader international community to ensure that South Sudan’s government and opposition return to dialogue and agree on a way forward. At the moment, he warned, “Both sides claim to be acting in self-defense, while at the same time