Three army officers were arrested on Saturday over the assault of a Sri Lankan journalist in 2008.
Keith Noyahr, an associate editor of The Nation was abducted from just outside him home in Colombo and tortured before being released in May 2008.
Major Prabath Bulathwatte, Sergeant Duminda Weeraratne and Sergeant Hemachandra Perera were summoned to the CID headquarters on Friday for questioning.
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This investigation is the latest in a string of inquiries by the Sirisena government into crimes against Sinhala journalists committed during Rajapaksa's presidency. Investigations into the disappearance and murder of Tamil journalists however have failed to progress at an equal speed despite the overwhelming number of murdered media workers being Tamil.