Sanaa: An explosion was heard Monday in the northwestern part of Shiraz, the capital of Fars province in southern Iran, amid a possible US attack, according to local media.

According to Anadolu Agency, residents in several parts of the city heard the blast, Iran's semi-official Fars news agency reported. Initial reports indicated that a site in the city had been targeted during what the agency described as an 'enemy airstrike.' There were no immediate reports of casualties or damage.