Iraq's Prime Minister Mohammed Shia' al-Sudani attends a ceremony marking the Police Day in Baghdad, Iraq, Jan 9, 2024. (PHOTO / POOL VIA AP)

BAGHDAD/UNITED NATIONS - Iraqi Prime Minister Mohammed Shia' al-Sudani on Tuesday denounced the Iranian missile attack on Erbil as an "aggressive act" that would undermine the strong bilateral relations.

The Iranian strike in Erbil, the capital of Iraq's semi-autonomous region of Kurdistan, was "a clear act of aggression against Iraq" as it targeted a residential area and its victims were an Iraqi Kurdish family, including children, the official Iraqi News Agency quoted al-Sudani as saying in a press statement released at the ongoing World Economic Forum in the Swiss Alpine town of Davos.

He added that the attack "is certainly a dangerous development that undermines the strong relationship between Iraq and Iran, and the Iraqi government reserves its right to take all diplomatic and legal measures consistent with the principle of national sovereignty."

We reviewed on the ground ... the home of the businessman who was targeted last night in Erbil, and it turned out that the allegations that talked about targeting the Mossad headquarters are baseless.

Qasim al-Araji, Iraqi National Security Advisor 

Earlier in the day, Iran's Islamic Revolution Guards Corps (IRGC) said it had launched barrages of ballistic missiles against the bases of "terrorists" and Israel's intelligence service Mossad in Syria as well as Iraq's Kurdistan Region respectively in response to recent anti-Iran "terror" attacks.

READ MORE: Iraq condemns Iran's missile attack on Erbil

However, Iraqi National Security Advisor Qasim al-Araji, who headed the government's investigation committee about the attack, denied the Iranian allegation in a tweet on social media platform X.

"We reviewed on the ground, accompanied by members of the investigative committee, the home of the businessman who was targeted last night in Erbil, and it turned out that the allegations that talked about targeting the Mossad headquarters are baseless," he said.

The United Nations showed concern over Iran's missile attacks in Syria and Iraq.

Emergency services clear the rubble of the house of Peshraw Dizayi that was hit in Iranian missile strikes in Erbil, Iraq, Jan 16, 2024. (PHOTO / AP)

"We are very concerned about these reported ballistic strikes that have been claimed by the Islamic Revolutionary Guard (Corps) that hit ... targets in Syria (and) in Iraq as well," said Stephane Dujarric, spokesman for UN Secretary-General Antonio Guterres, on Tuesday.

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"We once again urge maximum restraint and avoid any further escalation in a region that ... is already volatile and increasingly so. This kind of situation also can lead to miscalculation by parties with even worse consequences," he said.

Dujarric said the secretary-general further underlines that all security concerns between Iraq and Iran must be addressed through peaceful means and dialogue, in accordance with the principles of sovereignty, territorial integrity, and good neighborly relations.

On Monday night, the Kurdistan Region Security Council said in a statement that four people were killed and six others injured in the Iranian missile attack on "several populated civilian areas" in Erbil.