US officials have claimed that Iran has resumed production of ballistic missiles with the help of parts already stored in its underground facilities.

The American newspaper Wall Street Journal has quoted American officials as saying that despite attacks on missile sites and industrial facilities in the early stages of the war, Iran is engaged in assembling liquid-fueled and solid-fueled missiles.

According to an American newspaper report, Iran is developing ballistic missiles using existing components.

The American newspaper said that the production of ballistic missiles is going on in the underground facilities. These missiles are being produced in more limited numbers than before the war.