U.S. President Donald Trump has followed through on his promise to punish South Africa by signing an executive order stopping all aid and assistance to the country over what he called a human rights violation against a white minority group.

The party of South Africa's ex-president Jacob Zuma on Monday filed a treason complaint against AfriForum, a group championing the white Afrikaner minority, after Donald Trump attacked the country's new law aimed at redistributing white-owned land.

Trump signed proclamations raising the U.S. tariff rate on aluminum to 25% from his previous 10% rate "without exceptions or exemptions." The measures will take effect on March 4.