Fiji police are refusing to confirm they have taken prominent trade union leader, Felix Anthony, into custody.
But reports from a number of sources say Mr Anthony was arrested on Friday afternoon.
It follows the arrest a week ago of another leading trade unionist, Daniel Urai, after he returned from a trip to Australia.
The Australian Council of Trade Unions has recently launched a campaign to discourage its members from holidaying in Fiji to show solidarity with workers there.
Police are yet to say whether Mr Urai, who's the president of the Fiji Trades Union Congress, will be charged but under the interim regime's emergency regulations he can be detained for ten days.