The Arab Coalition fighting against the Houthi militia in Yemen said on Sunday that it considered the intercepted missile attack on Riyadh on Friday a blatant and direct military aggression by the Iranian regime, which may amount to an act of war against Saudi Arabia.

The coalition affirmed the kingdom’s right to legitimate defense of its territory and people as stated in Article 51 of the Charter of the United Nations.

During a press conference on Sunday, a spokesperson for the Saudi-led Arab coalition to support legitimacy in Yemen brought to light evidence that he said showed Iranian weapons support to the Houthi militia in the country.

Colonel Turki al-Malki presented pictures of weaponry and missiles launched by the Houthi militia towards Saudi Arabia.

The Arab coalition closed off the land, sea and air ports in Yemen early Monday after a missile targeted Riyadh, hours after an ISIS-claimed militant attack in Aden killed at least 17 people.