Houthi militias have downed a Saudi reconnaissance plane while it was flying over Najran Province on the border with Yemen, Saba news agency reported on Tuesday.
"The army's air defences and the popular committees downed a reconnaissance plane belonging to the Saudi-US aggression in Najran," the Houthi-controlled agency said.
The Iran-backed Houthis, who took over the Yemeni capital of Sanaa in a September 2014 coup, also announced on Tuesday that they attacked Saudi military sites on the Yemen-Saudi Arabia border, killing a Saudi officer and injuring two others.
According to Saba, the Houthis launched missile attacks on a number of Saudi military sites near the border, in addition to targeting a Royal Saudi Navy vessel allegedly involved in jamming local radar systems. A number of sailors were killed when the vessel caught fire.