The assassination was carried out despite heightened security measures due to the inauguration of President Masoud Pezeshkian which took place one day earlier, underscoring a severe breach. Reports are now suggesting that it might have been an "inside job".
A report by the New York Times says over two dozen individuals, including senior intelligence officers, military officials, and staff at the guesthouse, have been detained in connection with the incident.
The Revolutionary Guards Corps' (IRGC) specialized intelligence unit is now spearheading the investigation, tasked with identifying those responsible, the New York Times said.
Iranian authorities have not yet confirmed making any arrests in connection with the assassination. Despite the vague public statements, the severity of the situation is clear, as it shows the Islamic Republic cannot even protect its guests and allies.
"The perception that Iran can neither protect its homeland nor its key allies could be fatal for the Iranian regime, because it basically signals to its foes that if they can’t topple the Islamic Republic, they can decapitate it," said Ali Vaez, Iran director for the International Crisis Group, speaking to the New York Times.