How Yemen's rebels are increasingly deploying drones
Yemen and drone
In pic: An image grab taken from a video obtained by AFPTV shows the moment a drone exploded above Yemen's al-Anad airbase in in the government-held southern province of Lahj.
Battlefields for drones
But while the US uses American-made drones and the coalition has turned to Chinese suppliers, the manufacturer of the Houthis' drones in both the air and the sea has been a contentious question.
In pic: People load the wing of a drone the Houthis say they brought down near the northwestern city of Saada, Yemen.
The Ababil-T can deliver up to a 45-kilogram (100-pound) warhead up to 150 kilometers (95 miles) away.
The Qatef-2K, which the Houthis said they used in Thursday's attack, similarly resembles the Iranian designs.
In pic: An armed man stands by the wing of a drone the Houthis say they brought down near the northwestern city of Saada, Yemen.
Scene of a Houthi drone attack
The research group similarly said those drones share near-identical design and construction characteristics of Iranian drones.
In pic: Soldiers inspect the scene of a Houthi drone attack at Yemeni government military parade in al-Anad air base, Lahaj province, Yemen.
The drone boat
The officials also shared black-and-white images they said came from the ``drone boat.'' They said the pictures and associated data from the boat's computer showed Iranians building components for its guidance system in eastern Tehran, with a hat in the background of one picture bearing the symbol of Iran's hard-line paramilitary Revolutionary Guard.
They said those involved in building the components probably believed it would be destroyed in the blast, so they didn't wipe the computer's hard drive.
For its part, Iran repeatedly has denied supplying the Houthis with drone or ballistic missile technology. However, Iran would have an interest in seeing Saudi Arabia, its archrival in the region, tied down in a bloody, protracted conflict with no clear end in sight.
In pic: An image grab taken from a video obtained by AFPTV shows a Yemeni soldier walking above one of the wings of a drone that exploded above Yemen's al-Anad airbase in the government-held southern province of Lahj.