Fox News quoted American and Western intelligence sources as saying that Iran has recently increased its advanced weapons shipments to its proxy Hezbollah militia, including GPS systems, to convert unguided missiles into precision guided-missiles.

The US network said that an Iranian cargo plane arrived in Lebanon three days ago, belonging to the airline "Qeshm Air", which left Tehran at 9:33 on Tuesday morning, to an unknown destination, before landing in the Syrian capital Damascus, to move to Beirut, where it arrived at around 2:00 pm.  

Later that day, the plane flew from Beirut to Doha in Qatar, arriving after midnight, returning to the Tehran at 6:31 pm.

The United States and Israel, as well as other western intelligence agencies, have offered evidence that Iran has operated similar weapons factories in Syria and Yemen, in addition to Lebanon.