YouTuber KSI has claimed some Asda staff around the UK are keeping his popular Prime drink off shelves and “shipping it out low-key”.

In June the Watford-born musician launched the product in Watford alongside fellow YouTuber Logan Paul – which saw hundreds of frenzied fans gridlock parts of town.

Prime’s popularity has since turned it into a holy grail for some, with stocks regularly selling out within minutes of appearing at stores nationwide.

There is even a Prime Tracker account on Twitter designed to tip people off about deliveries.

Read more: Frenzied fans flock to see KSI and Logan Paul at Watford Asda

However, footage of KSI, who has tens of millions of social media followers, emerged earlier this month in which he blames the dearth on some supermarket staff.

He said: “I s*** you not the only place you’re meant to get Prime is Asda and Arsenal stadium, but people are getting it on petrol stations.

“You know how? Asda employees aren’t even ******* putting in on the shelves anymore.

“They’re like shipping it out low-key. They’re like what’s the point. I put it on the shelf [and] it’s gone instantly.

“**** it, I’m just gonna sell it on the black market myself. That’s what they’re doing bro.

“And then people are making pees (money) from it – because you can’t get it anywhere.”

Asda declined to comment, but it is understood there is no evidence supporting the claim.

However, the allegation has been echoed by others online, with one woman yesterday (Thursday) claiming a worker at an unspecified Asda store admitted Prime was not being put on shelves because "they are keeping cases for themselves".

Responding on Twitter, Asda's service team requested the poster send a private message with their full details along with the store and time of visit so it can help.

Numerous fans have also vented frustration online at not being able to get the drink.

However, in response to a flood of tweets, Asda did reveal new batches will be delivered to stores "towards the end of Septemeber", but warned "due to the popularity, this item can quickly run out of stock".