Mousavi's statement echoed that of Iran's United Nations ambassador, Majid Takht Ravanchi, who warned Monday that the situation in the Persian Gulf is "very dangerous" and said any talks with the usa are impossible in the face of escalating sanctions and intimidation.
The latest raids come amid spiralling regional tensions after Washington - a key ally of Riyadh - accused Iran of shooting down a United States drone and carrying out attacks on oil tankers in the strategic Gulf of Oman. Iran has denied any involvement.
The acting US ambassador to the United Nations is urging the world to join the United States in saying Iran's attacks on tankers in the Persian Gulf and its downing of a USA drone in worldwide airspace are "unacceptable".
"The UAE reiterates its solidarity with Saudi Arabia against any threat to its security and stability and supports all measures taken by the Saudi government to maintain the security of its citizens and residents", said the statement carried by the UAE news agency (WAM).
Relations between longtime foes Iran and the United States have deteriorated since Trump withdrew Washington a year ago from a 2015 accord that curbed Tehran's nuclear program in exchange for easing sanctions.
The U.S.is also set to announce "significant" sanctions against Iran in retaliation for the downing of the U.S. drone.
Iran's naval commander, Rear Adm. Hossein Khanzadi issued a warning to Washington that Tehran is capable of shooting down other American spy drones that violate Iranian airspace.
The US special envoy for Iran, Brian Hook, said that one plan could be to "enhance" an existing multinational maritime force in the region involving about 30 countries, which now fights drug and arms smuggling, with options to be discussed at the Group of 20 summit in Japan this week.
Iran's naval commander, meanwhile, warned that Iranian forces would not hesitate to act again and shoot down more USA surveillance drones that violate Iranian airspace.
The escalation of attacks by Iran-aligned Huthi rebels on Saudi cities threatens a hard-won UN-sponsored ceasefire deal for the Red Sea port city of Hodeida, war-ravaged Yemen's main conduit for humanitarian aid.
Saudi Col. Turki al-Maliki did not say what type of weapon was used in the attack. But he also said over the weekend that he appreciated Iran's decision to not shoot down a manned USA spy plane carrying 30 people.
In the wake of the attacks, US President Donald Trump ordered the warship Mason to be dispatched to the area, adding to the United States' already significant military presence in the region.
They included the recent oil tanker and drone attacks that have posed a threats to regional stability and safety of global maritime navigation.
Saudi Arabia has raised the number of people wounded in a Yemeni rebel attack on an airport in the kingdom to 21.
Mike Pompeo traveled from Washington to Saudi Arabia on Sunday to begin a set of hastily arranged meetings created to push back against what he calls the world's largest state sponsor of terror.
In what it says are defensive moves, the US has built up its military presence around the Persian Gulf in recent weeks.
Amid the tough talk on Iran, Pompeo himself says the U.S.is prepared to negotiate with Iran, without preconditions, in a bid to ease tensions.