An Iranian state broadcaster was briefly hacked during its nightly news programme with a message targeting supreme leader Ali Khamenei as anti-government protests entered their fourth week.

The newscast by the Islamic Republic of Iran News Network (IRINN), which comes under the Islamic Republic of Iran Broadcasting (IRIB) corporation, was briefly hacked by a group that called itself “Edalate Ali”, which roughly translates to “Ali’s Justice”.

The broadcaster on Saturday was airing a segment of Ayatollah Khamenei attending a meeting in Bushehr city when it was interrupted by roughly 15 seconds of footage which showed a mask against a black background and then an image of Mr Khamenei engulfed with flames and a red-coloured target appearing on his head.

The footage also had photos of Mahsa Amini, Nika Shahkarami, Hadis Najafi and Sarina Esmaeilzadeh – all of whom have died in a month in Iran.

The captions in the footage read “join us and rise up” and “our youths’ blood is dripping off your paws”, in a reference to the Ayatollah. A song with the lyrics “Woman. Life. Freedom” – a common chant of the protesters – played in the background.

Anti-regime protests erupted in Iran on 17 September after the burial of 22-year-old Mahsa Amini, a Kurdish woman who died in the custody of Iran’s feared morality police.

She was detained for allegedly violating the nation’s stringent Islamic dress codes for women.

Since her death, thousands of women have taken to the streets across the country in protest and resisted a fierce crackdown, in which rights groups said nearly 150 are estimated to have been killed and hundreds arrested.

Two people were reportedly killed in the Kurdish-majority city of Sanandaj as the anti-government protests entered the fourth week. A man was reportedly shot dead by the police while driving a car, while a second protestor was killed after security forces fired gunshots to disperse crowds.

Police officers denied using live rounds against the protesters, according to the semi-official Fars news agency.

Iranian president Ebrahim Raisi also faced a stern protest during a meeting with students from the all-female Al-Zahra University in Tehran, where chants of “get lost” reverberated from the corridors.

Protests continued in several universities in Tehran and have also spiraled into markets, with several shops shuttered in support of the demonstrations.

On Friday, the country’s Forensic Medicine Organisation said Amini did not die as a result of blows to the head and limbs and instead, died from multiple organ failure caused by cerebral hypoxia.

The coroner’s report argued that Amini “suddenly lost consciousness and subsequently fell” while in custody owing to “underlying diseases”, claiming she had taken medication for a disorder in her thyroid and adrenal glands following surgery for a benign brain tumour at the age of eight.

“Due to the ineffective cardio-respiratory resuscitation in the first critical minutes, she suffered severe hypoxia and as a result brain damage,” it added.

The report into Amini’s death was released as Iranian authorities denied claims that 16-year-old Sarina Esmaeilzadeh died after being beaten with batons by security forces during the protests in recent weeks, insisting instead that she threw herself from the roof of a five-storey building.