(CNN) Saudi Arabia says one person was killed after seven missiles were fired from Yemen by Iranian-backed Houthi rebels on Sunday. It's the first death on Saudi soil since the Saudi-led coalition began a military intervention in Yemen three years ago.

The missiles were fired at four targets, including the capital city of Riyadh, and all were intercepted and destroyed, said Saudi coalition forces spokesman Col. Turki al-Maliki in a statement. Fragments from the intercepted missiles killed an Egyptian resident, the statement added.

"These hostile acts continue to pose a direct threat to the Kingdom of Saudi Arabia and threaten regional, as well as international, security," the statement said.

However, in a statement, the Houthi Ministry of Defense claimed the missiles hit seven different targets inside Saudi Arabia, including four airports.

Following the missile strikes, thousands of people reportedly came out onto the streets of the capital Sanaa to take part in demonstrations coinciding with the third anniversary of the intervention against the Houthi rebels.

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