Mohsen Davari made the remarks in an interview with local media on Saturday, adding that they were planning to escape from Iran but were arrested in one of Khorasan Razavi's neighboring provinces.
He said that the murderer and his four companions were arrested with the efforts of security forces and police.
Davari said that the murderer has confessed to his crime.
According to Iranian media, Danial Rezazadeh and Hossein Zeinalzadeh, two young defenders of security, were martyred last Thursday in Mashhad.
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