Iran is close to finalising a deal with China to purchase supersonic anti-ship cruise missiles, according to six people familiar with the negotiations. The Chinese-made missiles have a range of about 290 kilometres and are designed to fly low and fast to evade ship defences. Experts say their deployment would significantly strengthen Iran's naval strike capabilities and pose a serious threat to United States forces operating in the region.

Talks that began at least two years ago accelerated after a brief war between Israel and Iran in June. Senior Iranian defence and government officials reportedly travelled to China as negotiations entered their final stages. While China’s foreign ministry said it was not aware of the reported discussions, the potential transfer would represent one of the most advanced weapons sales from China to Iran in decades.

The possible deal comes as the United States increases its naval presence near Iran and warns of potential military action if no agreement is reached over Iran’s nuclear programme. Analysts say the missile purchase would deepen military ties between China and Iran and could shift the regional balance of power, particularly at a time of heightened tensions and renewed sanctions imposed by the United Nations.