'I'm a prisoner of these babies!' Cristiano Ronaldo laughs off claims he should be in jail over tax fraud allegations by posting a picture with his three youngest children

Ronaldo took to Instagram to respond to a tax boss who said he should be in jail

The 32-year-old could face prosecution for more than £13m of tax fraud

The Real Madrid star insists that he has done nothing wrong 

Cristiano Ronaldo has laughed off claims he should be in jail over tax fraud allegations by posting a picture of himself with his three youngest children on Instagram and insisting 'I'm a prisoner of these babies.'

Reports in Spain today claimed that a Spanish Tax Agency boss had argued in court earlier this month that the Real Madrid striker should be behind bars while an investigating judge decides whether he should face prosecution for defrauding the public purse out of more than £13 million.

Respected Spanish daily El Mundo said Caridad Gomez Mourelo, head of the Spanish Tax Agency's fiscal crime unit, told the Madrid court probing Cristiano: 'We have people in prison for not paying £110,000.'  

Cristiano Ronaldo posted an Instagram photo with three of his youngest children, captioning it 'I'm a prisoner of these babies' after a tax boss said he should be in jail

She made the claim during a private hearing on December 7 to the judge leading the criminal probe sparked by the Spanish Tax Agency complaint against Ronaldo.

Early this afternoon, the footballer posted a picture of him holding his six-week-old daughter Alana Martina in his arms with his six-month-old twins Eva and Mateo sat beside him on the sofa.

But it was the caption he chose - writing: 'I'm a prisoner of these beautiful babies, hahaha' - which was making the headlines today.

It was widely interpreted by papers in Spain and his native Portugal as a direct message to Spain's Tax Agency, with Barcelona based daily El Periodico accusing him of poking fun at the central government organisation.

Ronaldo's eldest son Cristiano Jr, pictured, was not included in the Instagram snap

The Instagram post came four and a half months after he used the social media site to hit back at critics the day after he appeared in court to answer the tax fraud allegations.

Ronaldo, 32, went on the offensive alongside a photo of him standing like a God-like figure in the middle of a dazzling display of light.

Showing humility is not one of his character traits, he wrote at the time: 'What bothers people is my glow. Insects only attack lights that shine.'

His bizarre rant came after he reportedly told a judge during his closed court hearing in Madrid: 'If I wasn't called Cristiano Ronaldo, I wouldn't be sat here.'

The judge, Monica Gomez Ferrer, is said to have replied: 'You are mistaken. Plenty of anonymous people have sat where you are.'

Former Manchester United star Cristiano, who became a dad for the fourth time on November 12, has been accused of evading €14.7 million (£13.1 million) in tax between 2011 and 2014.

State prosecutors are claiming the footballer committed four counts of tax fraud by deliberately trying to hide earnings from image rights over those years.

He is insisting he has done nothing wrong.

Last month it emerged he had asked a consultancy firm called Equipo Economico, founded by Spain's Minister of Treasury Cristobal Montoro, to help him fight his ongoing tax case.

The man hired by Ronaldo's lawyer Jose Antonio Choclan to rebut the claims of Spain's Tax Agency is Manuel de Vicente-Tutor - a former tax inspector who if he had not transferred to the private sector could have been involved in the prosecution case against the world's best player.

Ronaldo, pictured during the recent El Clasico meeting with Barcelona, insists that he has done nothing wrong

The footballer has yet to be formally charged with any offence. 

In Spain, formal charges are only laid shortly before trial and Ronaldo's case is still in the investigative stage with a magistrate who will decide whether to recommend trial.

Manchester United boss Jose Mourinho is also the subject of an ongoing tax fraud case.

Prosecutors allege he owes the Spanish state almost £2.9 million in undeclared revenue relating to image rights in 2011 and 2012.

Ronaldo's latest Instagram post met with a mixed reaction from the public.

One said: 'Hopefully we'll laugh when you're a real prisoner, you idiot.'

But fan Ana Hipolito responded by saying: 'I'm with you. I believe in your innocence.'

Another preferred to focus on the photo alone, writing: 'How cute those babies are!'