The U.S. on Thursday threatened to impose visa restrictions on South Sudan nationals who undermine the peace process in the country.

The world's youngest nation has been beset by war for six years, with attempts to bring lasting peace continuously trampled.

"As the United States re-evaluates its bilateral relationship with the Government of South Sudan, the Department of State will implement visa restrictions… against those who undermine or impede the peace process in South Sudan," a statement from the U.S. Secretary of State Mike Pompeo read.

"Individuals who have directly or indirectly impeded peace including: violating a ceasefire or cessation of hostilities agreement; violating the UN arms embargo; engaging in corruption that fuels the conflict; suppressing freedoms of expression, association, peaceful assembly, or other abuses or violations; or by failing to abide by signed peace agreements may be subject to visa restrictions. Such visa restrictions could include immediate family members of these individuals."

Pompeo noted that the people of South Sudan have suffered in the years that the country has been dogged by a civil war.

Last month, the United States recalled its ambassador from South Sudan for consultations as part of a move to reevaluate the relationship with the African country.

The country plunged into chaos in December 2013 sparked by a feud between President Kiir and Machar.

(Source: U.S. State Department)