Sudan, currently in the midst of a devastating war, cut diplomatic ties with Iran in 2016 after Saudi Arabia and Persian Gulf countries cut or lowered diplomatic ties with Iran over an incident in the Saudi embassy in Tehran.
Saudi Arabia and Iran agreed to resume ties in March under a deal negotiated by China, raising expectations that Tehran and other Arab countries would fully re-establish diplomatic relations.
The decision to resume relations "came after a number of high-level communications between the two countries and will serve their mutual interests", the Sudanese foreign ministry said in a statement.
While there was no immediate statement from Iran, its foreign minister, Hossein Amir-Abdollahian, said in July that the two countries were working on resuming ties after he met Sudan's acting foreign minister, Ali al-Sadeq, in Baku.
KI