Guatemala's Constitutional Court has ordered President Jimmy Morales to allow the head of a U.N.-backed anti-corruption commission to return to the country.

Ivan Velasquez is the head of the commission known as CICIG for its initials in Spanish. It has led a number of high-profile graft investigations, including one that is pending against Morales.

Earlier this month the president announced that he would not renew CICIG's mandate for another two-year term, effectively giving it a year to wind down and end its activities.

He later said that Velasquez, who was traveling in Washington, would be barred from re-entering the Central American nation. Morales called Velasquez "a person who attacks order and public security in the country."