"The naïve Saudi rulers have made a mistake by opening war on Yemen," Rafsanjani said on Monday, and condemned the Saudi aggression against Yemen.

Rafsanjani, who is known to have had very good relations with senior Saudi officials when he was in power as Iran's president, voiced deep concern over the ongoing crisis in Yemen, and warned Riyadh officials that their attack on Yemen means playing with fire.

The clashes between the popular Ansarullah and the Saudi-backed loyalists of the fugitive President Mansour Hadi continue in the Southern parts of the country as Saudi Arabia has been striking Yemen for 103 days now to restore power to fugitive president Mansour Hadi, a close ally of Riyadh.

The Saudi-led aggression has so far killed at least 4,878 Yemenis, including hundreds of women and children.

Hadi stepped down in January and refused to reconsider the decision despite calls by Ansarullah revolutionaries of the Houthi movement.

Despite Riyadh's claims that it is bombing the positions of the Ansarullah fighters, Saudi warplanes are flattening residential areas and civilian infrastructures.