The United Nations and Germany called for restraint and calm after the assassination of the prominent Iranian nuclear scientist Mohsen Fakhri Zadeh yesterday near the Iranian capital Tehran, and the European Union described what happened as a criminal act, while Syria, the Lebanese Hezbollah, the Yemeni Houthi group, Hamas and the Palestinian jihad movements condemned the assassination of Fakhri Zadeh.

The Secretary-General of the United Nations, António Guterres, urged restraint and avoiding any actions that could lead to an escalation of tension in the region after the assassination of the Iranian nuclear scientist, while the European Union considered the assassination of Fakhri Zadeh a criminal act inconsistent with the principle of respecting human rights, and called on the European Union's foreign policy official Josep Borrell All parties need to remain calm and avoid escalation that would not be in anyone's interest.

The German Foreign Ministry spokesman called on all parties to exercise restraint after the assassination of the Iranian scientist, and to avoid escalating tensions that would derail any talks on the Iranian nuclear program.

"A few weeks before the new US administration takes office, it is necessary to preserve the space for talking with Iran in order to allow the dispute over the Iranian nuclear program to be settled through negotiation," the spokesman added.

Iranian Foreign Minister Mohammad Javad Zarif said on Twitter that there is important evidence about Israel's involvement in the assassination of Fakhrizadeh, while senior Iranian officials have vowed to avenge his death at "the appropriate time."

Syria and Turkey

On the other hand, Syrian Foreign Minister Faisal Al-Miqdad today accused Israel and "those who support it" of being behind the killing of Iran's largest nuclear scientist, stressing that it would only lead to an increase in tension in the region.

In Turkey, Parliament Speaker Mustafa Shantoub described the party that assassinated the Iranian nuclear scientist as a terrorist, and added in a tweet today that an illegal organization, state or legal organization carried out the assassination, does not change anything from being a terrorist operation.

The Lebanese Hezbollah condemned the assassination of the Iranian scientist and believed in a statement that the assassination comes in the context of "preventing the Islamic Republic from obtaining the resources of pride and power, and preserving its scientific progress and political and intellectual independence."

On Friday, the Islamic Resistance Movement (Hamas) and Islamic Jihad condemned the assassination of Fakhri Zadeh, and Jihad said it was a "sinful terrorist attack" and "bears clear Zionist and American fingerprints."

Hamas believed that the goal of assassinating the Iranian scientist was "to keep the tools of scientific progress and power in the hands of the Zionist occupation and its expansionist settlement project."

Today, the Houthi political bureau condemned the killing of the Iranian scientist, stressing Tehran's right to respond to "anyone who masterminded and carried out the crime."