Dutch Second Division side Fortuna Sittard have threatened to take legal action against Sunday Oliseh over claims that the club fired him because he refused to violate the law.

Hours after he got the axe, Oliseh took to Twitter to claim the club decided to suspend him because he refused to play ball.

The former Super Eagles coach wrote: “Due to my refusal to participate in illegal activities at Fortuna Sittard and violate the law, I have been suspended from my duties as coach by the foreign owners of Fortuna.”

Fortuna then challenged the former Nigeria captain to substantiate his claims on Thursday or face legal action.

“Fortuna want to fight the accusations made,” the club wrote on their official website.

“In this context, the club will also take the necessary legal follow-up steps. Fortuna does not recognise itself at all in these accusations, which were not highlighted by Sunday Oliseh internally.

“The case will be presented by Fortuna Sittard to the arbitration committee of the KNVB (the Dutch Football Association), an independent body, which will now make an assessment of whether there is sufficient grounds to terminate the employment contract of Sunday Oliseh.”

The outfit added, “Fortuna Sittard will no longer discuss any new unfounded accusations by Sunday Oliseh on the club’s website.

“Fortuna will take the appropriate legal countermeasures. If there are any questions from the side of the KNVB in this respect, Fortuna Sittard is fully open to internal investigation to show that the accusations are completely unfounded.”

The club on Wednesday, announced that they had appointed their youth team’s head coach Claudio Braga as the senior team’s caretaker manager “until the club has found a new trainer” after firing Oliseh.