Borussia Dortmund’s Youssoufa Moukoko is causing quite a stir at the moment.

The 12-year-old is seriously impressing at the German club and is already running riot for them at Under-17 level.

Not only that, he has recently scored on his debut for Germany Under-16s.

Let’s just remind you that he’s TWELVE years old.

Crazy.

But there might be something untoward happening, according to the club.

The Cameroon-born youngster moved to Germany with his father in 2014 and has been scoring a ridiculous amount of goals ever since.

In St Pauli’s Under-15 side, he scored 21 goals in 12 games as an 11-year-old.

He then moved to Dortmund and netted an unbelievable 33 goals in 15 matches at the same age level - again, as a 12-year-old.

One coach is questioning his age

It’s maybe not surprising that some people are questioning his age, then.

But it’s not just football fans that are unsubstantially pointing fingers at him. That’s because Dortmund’s Under-23 manager Timo Preus believes he’s older than 12-years-old.

"With Youssoufa, I can imagine that his age has only been guessed," Timo Preus, manager of the BVB U-23s, told Spox, per Goal

"Maybe in reality he is one or two years older. But certainly he is not 17. For him that is very difficult. There is nothing to blame him for, the boy is not cheating or anything."

Lars Ricken denies the claim

But it seems not everyone at the German club agrees.

Youth coordinator Lars Ricken is convinced that the wonderkid is being honest about his age.

"He is twelve years old. That is a fact and there is no doubt about it. Some media reports about him have been disappointing," the former Germany international told Ruhr Nachrichten.

"He plays in our U-17 because we believe that he belongs to this age class in a sporting way. He plays in a very good team and has team mates, who support him well."

Interesting.

To be fair, looking at highlights of Moukoko, he certainly appears too good to be playing in the Under-17 age-group despite being five years younger.

Watch: Moukoko's highlights

But to suggest that he’s lying about his age is just crazy.