The Saudi-led Arab coalition closed off all of Yemen's land, sea and air ports early Monday after a rebel-fired ballistic missile targeted Riyadh.

The Saudi authorities blamed the launch on Iran, warning it could be "considered as an act of war", Al Arabiya channel reported.

The coalition condemned Iran's involvement in such acts, saying supplying Houthis with ballistic missiles is considered a flagrant violation of UNSC resolutions.

The coalition urged the international community to hold Iran accountable for such acts.