Saudi Arabia's powerful Crown Prince Mohammed bin Salman, now touring the United States, must balance animosity towards Iran with the need for stability as he pitches the kingdom's economic transformation plan to foreign investors and drums up support for containing Iran's regional influence.
Although, this is of course worrying, the Iranian-Houthi forces are too weak to pose any threat to Saudi Arabia and it fact galvanises the opposition to Iran.
One Egyptian was killed and two of his countrymen were wounded by falling shrapnel in Riyadh, authorities said, with residents reporting loud explosions and bright flashes in the sky shortly before midnight.
Iran's Revolutionary Guards on Tuesday denied Saudi Arabian accusations that Tehran provided the Houthi rebels in Yemen with ballistic capabilities, a day after Saudi Arabia threatened retaliation against the Islamic Republic for a barrage of missiles fired by Houthi rebels from Yemen.
Houthis have been controlling much of Yemen's north by force, including the capital Sanaa since 2014.
Iran denies it is backing the Houthis. While liked by some diplomats during his term, he irritated many others with his strong-arm approach to diplomacy.
"(He) may leverage the recent Houthi missile attacks to strengthen his narrative that Iran's encroachment is undermining regional stability and that a more concerted global effort is needed to contain Iran".
This prompted the Saudi-led coalition to intervene militarily on March 26, 2015.
Mujahideen-e Khalq, which earlier had bases in Iraq since the 1980s, began as a group of Islamist leftists opposed to Iran's late Shah but fell out with Shi'ite Muslim clerics who took power after the 1979 revolution. "He tried to convince me that Israel should attack Iran". If not for them, who knows what danger Iran would have been able to inflict on the other people of the Middle East.
Western countries have urged Saudi Arabia and its Gulf Arab allies to protect civilians and find a quick end to Yemen's war.
The United Nations says more than 10,000 people have died in the war, and 22.2 million Yemenis - three-quarters of the population - need relief aid.
In a Tuesday statement, Iran's Foreign Ministry said that the Saudi rulers can not cover up their repeated defeats in Yemen by levelling accusations against others.