Turkey detains Iran consulate employee in murder probe
The employee, identified by Turkey's Anadolu state news agency by his initials M.R.N., is suspected of providing forged travel documents for the assassination's alleged mastermind, allowing him to return to Iran.
The investigation concerns the gangland-style killing in Istanbul on November 14, 2019 of Masoud Molavi, who had helped run a channel on Telegram called "Black Box" since March 2018.
The encrypted social media channel published corruption allegations against members of the Iranian government, judiciary and intelligence services.
Police at the time said Molavi, who claimed to have contacts within Iran's Revolutionary Guard, was killed by an assassin who fired a dozen shots.
In a tweet posted a few months before his death, Molavi warned that he was in danger of being killed before he could "eradicate the leaders of this corrupt mafia".
The neighbours enjoy robust trade and diplomatic ties despite a series of regional disputes, including in Syria.
According to the paper, the man who used the forged travel documents to escape Turkey is called Ali Esfanjani, the alleged "mastermind" of the killing.
Tehran accuses Chaab, who was based in Sweden, of being a leading figure of an Arab separatist group known as the Arab Struggle Movement for the Liberation of Ahvaz (ASMLA), which Iran has designated as a terrorist organisation.
In April 2017, Said Karimian, the owner of a leading Persian-language satellite entertainment channel, GEM TV, was shot dead in his car by unknown individuals in Istanbul.
Karimian was a British citizen of Iranian origin, and ran GEM TV from Dubai, offering Western programmes to Persian-speaking audiences, including US game shows and Turkish soaps.