Pat Cummins relative allegedly stabbed at Macquarie Park train ...

A teenager left fighting for his life after allegedly being stabbed by knife-wielding thugs is reportedly a close teenage relative of Australian cricket captain Pat Cummins.

The incident, which started in a park on Herring Road at Macquarie Park in Sydney's north-west last Sunday, left the 14-year-old in a critical condition.

Police allege the injured boy - who cannot be named for legal reasons - was involved in a fight with a group of teenagers in the park before fleeing to Macquarie University train station where he was allegedly stabbed by one of the teens. 

Seven News reports he is a relative of Pat Cummins. 

Footage shared on social media showed the alleged attackers taunting the victim, demanding he 'say sorry'.

The 14-year-old alleged victim, who is a close relative of Pat Cummins (pictured with partner Becky Boston), was rushed to hospital in a critical condition 

The victim can be seen with bloodied arms and his t-shirt soaked apparently with blood while walking down a set of stairs.

Another video shows him lying adjacent to an escalator with his t-shirt pulled up and his torso covered in blood. 

It was shared online with the sickening caption: 'What's wrong buddy' and a crying with laughter emoji. 

The victim was rushed to Westmead Children's hospital after suffering stab wounds. Five boys have been charged over the incident. 

One video shows him lying at the top of an escalator with his t-shirt pulled up and his stomach covered in bloodstains. It was shared with the sickening caption: 'What's wrong buddy' and a crying with laughter emoji (pictured)

Police allege the injured boy was involved in a fight with a group of teenagers in the park before fleeing to Macquarie University train station (pictured) where he was allegedly stabbed by one of the teens

An NSW Police spokesperson said: 'Following inquiries, five boys were arrested at Cherrybrook Train Station a short time later and conveyed to Ryde and Castle Hill Police Station.' 

Two of the boys, aged 13 and 15, were charged with affray and possession of prohibited drug.

The other three, one aged 14 and two aged 17,  were charged with affray.

They were all granted conditional bail and will appear before Surry Hills Children's Court on Monday 26 June.