The United States Monday denounced the latest Houthi attack on Saudi Arabia after the Iran-backed militia launced drones and ballistic missiles at the Kingdom.

“We condemn the Houthi attacks on Saudi Arabia following the calm over Eid al-Adha. The Houthis must stop their destabilizing actions and commit to an immediate, comprehensive ceasefire to help end the Yemen war,” read a tweet from the State Department’s Bureau of Near Eastern Affairs (NEA).

“Time to return to negotiations and end the conflict,” the State Department said.

President Joe Biden has said since taking office in January that putting an end to the Yemen war is a priority.

He assigned Tim Lenderking as his special envoy to Yemen with hopes that his diplomatic efforts would help end the war.

But the Houthis continue to lob bomb-laden drones and missiles at civilian targets across Saudi Arabia and reject to engage in negotiations on a ceasefire.

And US officials have showed concerns that the Houthis are acquiring more sophisticated weapons and drones from Tehran.

Over the weekend, Saudi air defenses intercepted four Houthi militia drones and a ballistic missile targeting the country’s southern region, according to Al Arabiya sources in the Arab coalition.