Iran has warned of the threat of an "uncontrollable explosion" of the situation in the Middle East. This comes after the United States vetoed a United Nations Security Council resolution calling for a ceasefire in the Gaza war.<br />''    <br />'' The Iranian foreign minister, Hossein Amir-Abdollahian, praised the UN chief's decision to use Article 99 of the UN Charter. Article 99 states that, the Secretary-General may bring to the attention of the Security Council any matter which in his opinion may threaten the maintenance of international peace and security.