Afkham on Sunday regarded such measures as genocide and said they are in full contradiction with international regulations.
She underlined that Riyadh has resorted to unconventional weapons over the past 40 days with the purpose of increasing the death toll.
Afkham further called for a more active role by the United Nations to stop the attacks on the defenseless people of Yemen and to expedite delivering aid to the war-torn country.
Saudi Arabia started its military aggression against Yemen on March 26 -- without a UN mandate -- in a bid to undermine the Houthi Ansarullah movement and to restore power to the fugitive former president, Abd Rabbuh Mansour Hadi, who is a staunch ally of Riyadh.
According to the latest UN figures, the Saudi military campaign has so far claimed the lives of over 1,400 people and injured close to 6,000, roughly half of whom have been civilians.