Dariush Mehrjui, one of Iran's most well-known film filmmakers, and his wife were discovered dead.
The 83-year-old and Vahideh Mohammadifar was discovered wounded by stabs on Saturday night in their house outside of Tehran, according to Iranian authorities.
One of the pioneers of Iranian new wave film was Mehrjui.
According to local media reports, four people have reportedly been named in the fatalities.
Hossein Fazeli, the chief justice, claimed that Mehrjui had invited his daughter to spend the evening with him at his residence in Karaj.
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She reportedly discovered her parents' bodies when she got there.
A recent complaint by Mohammadifar, a screenwriter and costume designer, claimed that she had received threats and that her home had been broken into.
Houman Seyedi, an Iranian actor and filmmaker, was one of several who responded to the killings on social media by calling them "terrible and brutal."
A villager's fixation with the titular cow is the subject of Mehrjui's 1969 film The Cow, which narrates the tale. Mehrjui, who studied in the US as a young man and then lived in France for five years, initially gained national and worldwide attention with this work.
His other well-known movies include Hamoun, The Pear Tree, and Leila, the last of which is about an infertile woman who persuades her husband to wed again.
Mehrjui was well-known for drawing inspiration from literature, even though the new wave movement mainly emphasized realism.
Over the years, he won numerous honors, but despite the praise his films garnered at international film festivals, some barely made it to Iran owing to censorship.
