About 700 striking staff of the Fiji Revenue and Customs Authority have returned to work after the management agreed to immediate salary negotiations.
They were demanding a 30 percent pay increase after learning that management staff had been given awards of up to 66 percent.
The minister for labour, Kenneth Zinck, had declared the strike illegal, with his ministry now saying that they have referred the walkout to the director of public prosecutions.
A spokesman for the labour ministry says the strike was called without first reporting a trade dispute and holding a secret ballot.
Meanwhile, staff of the Fiji Institute of Technology have staged a walkout demanding the sacking of their director, Kolinio Meo, and a commission of inquiry into its affairs.
They say they are frustrated with the way the management has been handling their grievances.