The crash in the early hours of Sunday killed the country's minister of endowment, Ghazi al-Sadeq, and a leading member of Sudan's Peace and Justice Party, Makki Balayela.
They were en route to the volatile South Kordofan state, to attend prayers for a Muslim holiday.
Earlier reports from Sudan's state news agency SUNA said the plane crashed "due to harsh weather conditions" in a mountainous area near Talodi, a small town about 650 kilometers, or 406 miles, southwest of the capital, Khartoum.
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