The Kuwaiti daily Al-Jarida reported on March 11, 2017, citing an aid to Mohammad Ali Jafari, commander of Iran's Islamic Revolutionary Guards Corps (IRGC), that Iran established facilities for manufacturing missiles and other weapons in Lebanon and has recently handed them over to the management and oversight of Hizbullah. According to the daily's source, the facilities are more than 50 meters underground and heavily shielded against aerial attacks. He also clarified that various parts of the missiles are manufactured in different factories and then assembled together.
The following is a translation of the report:
The Al-Jarida report
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With Iran facing growing pressures from the Donald Trump administration and the Israeli government under Binyamin Netanyahu, an aid to the IRGC commander told Al-Jarida that Iran has built factories [for manufacturing] missiles and [other] weapons in Lebanon and has recently turned them over to Hizbullah. In response to statements by Iranian Defense Minister Hossein Dehghan several days ago – who said that Hizbullah is capable of manufacturing missiles [that can] hit any part of Israel [but] gave no details or explanations – a knowledgeable source who wished to remain anonymous said that, after Israel destroyed an Iranian arms factory in Sudan several years ago that had supplied arms to Hizbullah, and after [Israel also] bombed an arms convoy that was intended to reach Hizbullah via Syria, the IRGC launched a project for establishing arms factories in Lebanon [itself]. [The source] also claimed that a special department has been established at the IRGC's Imam Hossein University [in Tehran] to train Lebanese and other experts, and that hundreds of experts have already been trained.
"According to the source, the factories are more than 50 meters underground, and above them are several layers of shielding so that Israeli planes cannot hit them. Moreover, manufacture of the missiles does not take place in one factory; different parts are built in different factories and then assembled together. He added that the transfer of the factories to Hizbullah's [management] was gradual but that they have been under full Hizbullah management and oversight for three months now.
"The source stressed that Hizbullah is able to manufacture several kinds of missiles, some with a range of over 500 km, including surface-to-surface and surface-to-sea missiles; torpedoes launched from light high-speed boats; spy drones and [attack] drones armed with weapons and rockets; anti-tank missiles, and fast armored boats. He clarified that weapons produced in these plants have been used in the Syria war and were proved to be effective. Anti-tank missiles managed to destroy car bombs that targeted Hizbullah fighters. He [also] noted that Hizbullah manufactures cannon, machine guns, anti-aircraft guns, mortars, and various [other] missiles and bullets, especially armor-piercing ones..."
 Al-Jarida (Kuwait), March 11, 2017.