The September 16 death of Kurdish Iranian woman Mahsa Amini, 22, while in the custody of Iran's morality police has sparked a major wave of protests and a crackdown that has left scores of demonstrators dead over the past 12 nights.

Iran's Islamic Revolutionary Guard Corps has accused the Iraq-based Kurdish groups of "attacking and infiltrating Iran ... to sow insecurity and riots and spread unrest".

After earlier Iranian cross-border attacks that caused no casualties, a barrage of Iranian missiles and drones on Wednesday claimed nine lives and wounded more than 30, said the regional health minister in Arbil, Saman al-Barazanji.

"There are civilians among the victims", including one of those killed, a senior official of the Kurdistan autonomous region told AFP.

Iran state television said the Guards had "targeted several headquarters of separatist terrorists in northern Iraq with precision missiles and destructive drones".

An AFP correspondent reported smoke billowing from locations hit, ambulances racing to the scene and residents fleeing, at Zargwez, about 15 kilometres (10 miles) from Sulaimaniyah.

- 'Cowardly attacks' -

In Baghdad, Iraq's federal government called in the Iranian ambassador to protest the deadly strikes, while the UN mission in Iraq deplored the attack, saying "rocket diplomacy is a reckless act with devastating consequences".

"These attacks need to cease immediately," the UN mission said on Twitter.

The United States said it "strongly condemns" Iran's "brazen attacks" and warned against further strikes, said State Department spokesman Ned Price.

Britain said Iraq's "indiscriminate bombardment" demonstrates "a repeated pattern of Iranian destabilising activity in the region".

Germany also slammed the "escalation ... against the backdrop of domestic political protests in Iran" and rejected "attempts to locate the causes of the Iranian protests in the neighbouring country".

Other Iranian strikes Wednesday destroyed buildings around Zargwez, where several exiled left-wing Iranian Kurdish parties maintain offices.

"The area where we are has been hit by 10 drone strikes," said Atta Nasser, an official from exiled Iranian group Komala.

"The headquarters of the Kurdistan Freedom Party has been hit by Iranian strikes," Hussein Yazdan, said an official from the party about the site in the Sherawa region south of Arbil.

Another group, the Kurdish Democratic Party of Iran, said its bases and headquarters in Koysinjaq, east of Arbil, were also struck by "missiles and drones".

"These cowardly attacks are occurring at a time when the terrorist regime of Iran is unable to crack down on ongoing protests inside and silence the Kurdish and Iranian peoples' civil resistance," it tweeted.

- Attack drones -

Amini, 22, died in Tehran three days after being arrested for allegedly violating Iran's strict dress code for women that demands they wear hijab headscarves and modest clothes.

Her death sparked Iran's biggest protests in almost three years and a crackdown that has killed at least 76 people, according to the Oslo-based group Iran Human Rights, or "around 60", according to Iran's semi-official Fars news agency.

Protests have rocked especially Kurdish communities in western Iran that share strong connections with Kurdish-inhabited areas of Iraq.

Many Iranian Kurds cross the border into Iraq to find work, due to a biting economic crisis in Iran driven by US sanctions.

The Guards' General Abbas Nilforoushan, deputy for operations, said Tuesday about Iraqi Kurdistan that "the establishment of a base by the enemies of the Islamic Revolution in this region is not acceptable," Tasnim news agency reported.

"For some time now, counter-revolutionary elements have been attacking and infiltrating Iran from the northwest of the country to sow insecurity and riots and spread unrest."

He added that several of "these anti-revolutionary elements were arrested during some riots in the northwest (of Iran), so we had to defend ourselves, react and bomb the surroundings of the border strip".

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