Diplomats say the United Nations Security Council is discussing imposing sanctions on two more South Sudanese individuals for continuing to fuel the conflict in the world's newest nation.

The council called for an immediate end to fighting in a statement after a closed-door meeting Friday and again threatened sanctions if the government and opposition don't fully implement the peace agreement they recently signed.

The diplomats, speaking on condition of anonymity because discussions were private, said U.S. Ambassador Samantha Power raised the possibility of imposing an arms embargo and travel ban on one individual each from the government and the opposition.

The council welcomed the commitment by South Sudan's feuding president and ex-vice president to halt military operations but expressed "deep concern" at recent reports of fighting.