TEHRAN, July 13 (Xinhua) -- Multiple explosions were heard early Monday in the port cities of Sirik, Bandar Abbas and Jask, all in southern Iran's Hormozgan Province, Iran's state-run Press TV reported.

Initial reports showed that a telecommunications tower near Sirik was hit, the same site targeted in previous attacks, Press TV said on social media platform X.

So far there has been no report of civilian casualties, it said, citing the provincial governor's office.

Minutes after the explosions, the U.S. Central Command said on X that its forces began launching more strikes against Iran "to continue degrading their ability to attack civilian mariners and commercial ships freely transiting the Strait of Hormuz."

On Sunday, the United States and Iran traded another round of attacks over navigation in the strait despite a memorandum of understanding signed by the two countries in mid-June.