Arsenal have signed highly-rated youngster Semi Ajayi on a free transfer from Charlton.

The central defender announced the news on his Twitter account, although the Gunners have yet to confirm the move.

The 19-year-old tweeted: ‘Thank you everyone for the messages wishing me well on my move to Arsenal I’ve been overwhelmed by the amount and I’m truly grateful.

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‘It was sad to end my ten year spell with charlton this summer but I can’t speak highly enough of all of the wonderful people I met during my ten years there & I wish all those at @CAFCofficial the best for the future as I will always have a soft spot for the club & it’s fans.

‘Delighted to announce that I have officially signed for @Arsenal FC. Can’t wait to see what the next two seasons here have in store for me.

‘Thank you everyone for the messages wishing me well on my move to Arsenal I’ve been overwhelmed by the amount and I’m truly grateful.’

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Londoner Ajayi has no first-team experience with the Addicks and spent part of last season on loan at neighbouring Conference club Dartford. Norwich also tracked Ajayi, who has played three times for Nigeria Under-20s, and he lined out for the Canaries in pre-season.

Op, which planet do you live.

Hi there @Hollandis