The UN Security Council have called an emergency session at Iran's request after the killing of Hamas political bureau chief Ismail Haniyeh in Tehran, the Russian presidency of the council announced.
A council spokesperson said Iran's request to hold the session had been supported by Russia, Algeria and China.
Hamas announced on Wednesday, the assassination of its political bureau chief, Ismail Haniyeh, following an airstrike on his residence in Tehran, after he participated in the inauguration ceremony of the new Iranian president, Masoud Pezeshkian.
For its part, the Iranian Revolutionary Guard said in a statement that it is studying the dimensions of the incident of Haniyeh's killing in Tehran and will announce the results of the investigation later.
The Iranian mission to the United Nations confirmed on Wednesday that the response to the assassination of Hamas political bureau chief Ismail Haniyeh in Tehran will be through special operations.
The US Central Command said it will begin implementing a blockade of all maritime traffic entering and exiting Iranian ports on April 13 at 10 a.m. ET (1400 GMT), after President Donald Trump said the US Navy would start blockading the Strait of Hormuz.
Hungary's veteran nationalist leader Viktor Orban lost power to the upstart centre-right Tisza party in Sunday's national election after 16 years in office, marking a setback for his allies in Russia and US President Donald Trump's White House.
President Donald Trump said on Sunday the US Navy would immediately start blockading the Strait of Hormuz, raising the stakes after marathon talks with Iran failed to reach a deal to end the war, jeopardising a fragile two-week ceasefire.
At least 200 people are feared dead after Nigerian military jets struck a village market while pursuing rebels in the northeast of the country on Saturday night, a councillor for the area and residents said on Sunday.
Russia and Ukraine accused each other on Sunday of breaching the 32-hour ceasefire in their four-year war, reporting more than a thousand drone and shelling attacks just hours after the truce began on Saturday to mark Orthodox Easter.