South Sudanese and Ugandan lawmakers have expressed concerns over the deployment of Ugandan troops to South Sudan without parliamentary knowledge or approval, citing constitutional and financial implications.

Uganda has deployed an unknown number of troops to South Sudan in a bid to protect the fragile government of President Salva Kiir as a tense rivalry with his deputy threatens a return to civil war in the east African nation.

The US is evacuating non-emergency personnel from oil-rich South Sudan amid concerns that Africa’s youngest nation is again on the precipice of civil war.