Saudi air defenses intercepted on Thursday two drones launched by Iran-backed Houthi militias toward Jazan, the Arab Coalition spokesman said.
In a statement carried by the Saudi state news agency SPA, the spokesman, Colonel Turki al-Maliki, said the drones were downed.
He reiterated that Saudi Arabia has the right to take any measure that would deter such hostile acts.
Earlier Thursday, the Coalition said a projectile launched by the militias had landed on Wednesday night near a Saudi desalination plant in Shuqaiq, causing no casualties or damage.
Maliki said security forces were working to determine what type of projectile had been used.
The attack constitutes a war crime for targeting civilian facilities, and shows that Iran is supplying the insurgents with new weapons, Maliki said.
He added that the Houthis continue to use Hodeidah Port to smuggle arms and destabilize the region and the world.