South sudan police
US accuses South Sudan sides of blocking peace
Machar, the US said, had obstructed arrangements by arbitrarily asking for more forces & heavy weapons.
The two sides said a deal had been reached on Machar’s delayed return to form a unity government.
The UN said last month that South Sudan’s warring parties are killing, abducting and displacing civilians.
Salva Kiir asked for another 15 days of discussions, shrugging off pressure to meet a deadline for a deal.
South Sudan's leader and rival are holding talks this week in Addis Ababa on forming a unity government.
The sanctions are aimed at forcing an end to violence in the country.
The UN mission in South Sudan said on Monday the bombs had been found on 10 February.
The justice minister says Riek Machar should be tried for treason for his role in weeks of bloodshed.
United Nations reported that over 45,000 civilians have been displaced in South Sudan.
South Sudan govt says it is no longer in control of Bentiu, the Capital of Unity State.
Talks between Sudan and South Sudan to resolve lingering issues will resume next week.