Fiji police say they are still questioning the Fiji Trades Union Congress General Secretary Felix Anthony.
Fiji Village reports the assistant police commissioner Henry Brown as saying he cannot confirm whether charges will be laid against Mr Anthony.
Mr Brown says other people may be brought in for questioning depending on what is found during the course of the investigations.
The FTUC President, Daniel Urai, was granted bail by the Suva Magistrates Court with strict conditions yesterday.
Mr Urai is charged with urging political violence and inciting antagonism against the interim regime.
He has to follow a curfew from 8pm to 6am and to remain at his home in Lautoka.