“South Sudan has not communicated to us officially on the matter, therefore, I cannot comment on the issue sufficiently,” Dr Mutua told Nation newspaper.

Foreign Affairs Principal Secretary Dr Korir Sing’oei said Kenya had not encroached on the territory of South Sudan noting that boundary delimitation is currently ongoing under African Union, Nation reports.

“Kenya respects the territorial integrity of all her neighbors and has not encroached on any of their territories. A boundary delimitation process of all borders under the AU is ongoing and is being conducted consultatively and jointly with our neighbors,” said the Kenya official.

He added: “Our Kenya National Boundaries Office (Kenao) is in charge of this process.”

Juba has played down the allegations of encroachment, as Information Minister Michael Makuei Lueth urged the public to be calm and leave the matter to be resolved by the two governments.

On Wednesday, President Salva Kiir met the Kenyan Ambassador to South Sudan and to discuss the border situation.

Shortly after the meeting, the Deputy Minister of Foreign Affairs Deng Dau Deng called for calm aming South Sudanese saying the two government will resolve the issue through diplomacy.

However, Nation newspaper reports Thursday that Deputy Minister Dau, said Kenya and Uganda are claiming part of the South Sudan borderline, pointing out that Juba will not cede an inch of the territory.

Deng reportedly said that Juba has reported Kenya and Uganda to the African Union over the alleged border encroachment, in a row that could unsettle the East Africa Community trading bloc if it escalates.