The US army reported that the missiles launched by Iran backed Houthi militias targeting its navy ship in the Red Sea were “C202 silkworm” missiles that Tehran had imported from China.
Iran has been using the coasts of Shabwa and Hadramout to traffic weapons to Houthi militias, thus violating the Security Council’s decision to ban the export of arms to rebel militias.
Iran did not only provide weapon to Yemeni militias, as it has also transported arms to the “Popular Mobilization” units in Iraq and “Hezbollah” militia in Lebanon. Moreover, Iran has even sent arms and gear to Syrian militias. It has previously supplied the “Popular Mobilization” militia with tens of Scud missiles, shells and launchers, and so it did with Hezbollah and Assad regime militias.
It is worth mentioning that the weapons sent to these militias are imported from China, North Korea and Russia. Slight modifications on these weapons, including the change in their names, are undertaken in Iranian factories.
Under-Secretary-General for Political Affairs, Jeffrey Feltman, confirmed that Iran is breaching international laws by providing weapon to the mentioned militias.

Source: Al Arabiya, 15 Oct. 2016