At the time, the United States and the European Union urged calm amid fears the dismissals could spark political upheaval in the country.
While Kiir is leader of the ruling SPLM party, many of the dismissed ministers, including Machar, were key figures in the rebel movement that fought a decades-long war against Sudan that led to South Sudan's independence in 2011.
The local Sudan Tribune newspaper reported on its website that military clashes erupted late Sunday between members of the presidential guard in fighting that seemed to pit soldiers from Kiir's Dinka tribe against those from the Nuer tribe of Machar.
In a message to American citizens Monday, the U.S. Embassy in Juba said it had received “reports from multiple reliable sources of ongoing security incidents and sporadic gunfire in multiple locations” across Juba.
“The U.S. Embassy has not been able to confirm that gunfire and insecurity have fully ceased,” the message said.
