The police in Fiji have confimed a New Zealand man Jagath Karunaratne is in police custody for questioning.
A family member Rajesh Singh says they are concerned for the IT professional's safety and feared he had been taken to the military barracks in Suva.
Mr Singh says they understand he is being investigated over anti regime graffiti although this could not be confirmed with the Fiji police.
Fiji's Assistant Commissioner of Police Henry Brown says Mr Karunaratne is among a group of people being questioned but he is the only foreign national.
Henry Brown says he is being well looked after and has been seen by New Zealand consular officials.
He says no charges have been laid.