The Roadside bombs disguised as rocks in Yemen shed the light on the Iranian role in arming Houthis and training them to terrorize the peaceful citizens, since they bear similarities to others used by Hezbollah in Lebanon and by insurgents in Iraq and Bahrain.



The link between the bombs and Iran was highlighted in a report by Conflict Armament Research, to prove the West and United Nations researchers' accusations to Iran of supplying arms to Yemen's Houthis terrorists, who have held the country's capital since September 2014.



Ballistic missiles are kind of arms provided by Iran to its puppet in Yemen, which used to target Saudi Arabia that leads a military coalition of Arab nations against Houthis in Yemen. A barrage of Houthi missile fire late on Sunday killed one person in the Saudi capital, Riyadh, and wounded two others.



Iran has long denied supplying arms to the Houthis, and its mission to the United Nations is dismissing the new report.



Yemen is the Arab world's poorest country where over 10,000 people have been killed, which Iran found a golden chance to spread its terrorists and dominate another piece of Arab world.



"What we're hoping this does is make plausible deniability not very plausible," said Tim Michetti, head of regional operations for Conflict Armament Research. "You can't really deny this anymore once the components these things are made with are traced to Iranian distributors."



Michetti's organization, an independent watchdog group that receives funding from the United Arab Emirates, Germany and the European Union to research weaponry recovered in Yemen, said it examined a fake rock bomb in January near Mokha, some 250 kilometers (150 miles) southwest of the capital, Sanaa. The fiberglass-encased bomb, packed with explosives were used with lethal effect against US troops following the 2003 invasion of Iraq.

Electrical circuitry in the bombs was similar to those manufactured by militants in Bahrain, while the bombs bore markings suggesting one workshop mass-produced the explosives, the report said.



Investigators also found a type of Chinese-manufactured wire covering used in other Iranian materiel.



Experts who examined the explosives said that "construction indicates that the bomb maker had a degree of knowledge in constructing devices that resembled, and possibly functioned in a manner similar to (explosively formed projectile bombs) that have been forensically tied to Iran and Hezbollah," the report said.



This is not the first time Iran has been accused of arming the Houthis; the US Navy's 5th Fleet, based in Bahrain, has repeatedly said Iran sends arms into Yemen. It points to seizures over a four-week period in early 2016, when coalition warships stopped three dhows, traditional ships that ferry cargo in the Persian Gulf. The dhows carried thousands of Kalashnikov assault rifles as well as sniper rifles, machine guns, rocket-propelled grenade launchers, anti-tank missiles and other weapons.



The group has also said drones used by the Houthis to crash into Patriot missile batteries in Saudi Arabia share "near-identical design and construction characteristics" of Iranian drones.



The weapons transfers also allegedly include ballistic missile technology. The United Nations, Western countries and the Saudi-led coalition fighting in Yemen all say the Houthis' Volcano missile mirrors characteristics of an Iranian Qiam ballistic missile.