The Saudi-led Arab coalition announced on Monday it had destroyed two drones over Yemen.
The aircraft were aimed at Saudi Arabia, added the coalition.
It stressed that it would "firmly address the sources of threat" in retaliation to the "barbaric and dangerous" behavior.
The coalition's operations are in line with international humanitarian law, it added.
Late on Sunday, the coalition said it had destroyed three operations centers used by the Iran-backed Houthi militias in the Yemeni capital, Sanaa.
The Saudi air defenses also shot down a Houthi drone that was fired at civilian locations in the Kingdom.