DUBAI (AP): U.S. and Iranian negotiators have reached a tentative agreement to extend the existing ceasefire by 60 days and launch official talks on Iran's nuclear program, according to a U.S. official familiar with the matter.

The official, who spoke on the condition of anonymity as they were not authorised to comment publicly, noted that President Donald Trump still needs to formally sign off on the emerging memorandum of understanding.

The details of this tentative agreement were first reported by the news outlet Axios.

The breakthrough comes at a delicate moment when the highly fragile ceasefire between the United States and Iran appeared to be wavering.

Earlier on Thursday, the U.S. military accused Iran of violating the ceasefire after Kuwait reported coming under attack following an American strike against the Islamic Republic.