Yemen’s Ansarullah fighters and allied army units have carried out more retaliatory missile attacks against Saudi Arabia, targeting several locations in the kingdom.

Yemen’s military on Sunday night targeted King Khalid International Airport in Riyadh, as well as Abha, Najran and Jizan Regional Airports with ballistic missiles.

The Saudi air force intercepted some of the missiles over the northeastern part of the capital Riyadh late on Sunday night, according to Saudi television channels.

Meanwhile, SPA news agency reported Yemeni forces fired seven missiles into the kingdom, killing an Egyptian national and wounding two other Egyptians.

Saudi coalition's spokesman Colonel Turki al-Malki said the death and injuries occurred in a residential building and were due to falling debris.

The missile attacks come on the third anniversary of Saudi Arabia’s onslaught against its southern neighbour.

According to international institutions, the continuing air, sea, and land blockade of Yemen, by Saudi Arabia has led to the worst humanitarian situation in the world today, with an estimated 20 million Yemenis on the verge of famine and hunger.

More than 14,000 people have been killed since the onset of Saudi Arabia’s military campaign against Yemen in March 2015. Much of Yemen's infrastructure, including hospitals, schools and factories, has been reduced to rubble due to the war.

According to a report by Yemeni Ministry of Human Rights on Sunday, the ongoing Saudi-led military campaign against Yemen has killed and injured over 600,000 civilians, including more than a quarter of a million children.