Ebrahim Azizi, chairman of Iran's national security commission, made the threat on Saturday via a post on X.
Citing Article 51 of the UN Charter, he argued that by providing drone support to Israel, "Ukraine has effectively become involved in the War" – making "its entire territory into a legitimate target for Iran".
Kyiv swiftly rejected the Iranian threat.
Mykola Tychyi, a Ukrainian foreign ministry spokesman, said the Iranian regime had "for years supported the killing of Ukrainians" by supplying Russia with drones and production technology.
"It is absurd for representatives of this regime to threaten Ukraine while invoking the right to self-defence enshrined in Article 51 of the UN Charter," he told reporters.
"It is like a serial killer justifying his crimes by citing the penal code."
Ukrainian President Volodymyr Zelensky said last week that the United States had approached him for assistance in building drone defences, acknowledging Ukraine's experience combating Iranian-made Shaheds used by Russia.
He also confirmed sending Ukrainian specialists to Gulf states including Saudi Arabia, Qatar and the UAE, but made no mention of Israel in this context.
Iran has been a strategic ally of Russia since 2022, supplying kamikaze drones and the technology to mass-produce them on Russian soil.
Since then, Moscow has launched approximately 57,000 such drones against Ukrainian cities, killing hundreds of civilians, according to officials.
Azizi's remarks come as the US-Israeli military campaign against Iran enters its third week.
While American and Israeli forces strike targets inside Iran, Tehran has been retaliating against Gulf states hosting US military bases.
(ał)
Source: PAP