The SPLM in Opposition says its deputy chairman, General Alfred Ladu Gore, is arriving in Juba today as part of the implementation of the peace agreement.
Gen Ladu was initially scheduled to return to Juba on Sunday, but he failed to show up over what opposition officials say was a technical delay in Nairobi.
But in a statement issued on Monday evening, the advance team of the opposition in Juba said Gen Ladu would arrive in Juba at noon today.
He is coming ahead of his boss, Dr Riek Machar, who has confirmed that he will be in Juba on the 18th of April to work with President Salva Kiir in forming a transitional government of national unity.