Two aid workers were killed in South Sudan after being shot dead by militants.

A number of militants set an ambush and targeted the car carrying the two workers, leaving both of them dead, Al-Arabiya Channel reported, quoting the Danish Demining Group (DDG) chief Tammy Hall, who described the attack as "tragic".

At least 51 aid workers have been killed since war broke out in December 2013 in South Sudan, according to the United Nations. 

Civil war broke out in December 2013 when President Salva Kiir accused his former deputy Riek Machar of planning a coup, setting off a cycle of retaliatory killings that have split the poverty-stricken, landlocked country along ethnic lines.

Source: MENA