US sports tycoon Stan Kroenke has increased his influence at Arsenal after he moved up to 28.58 per cent ownership of the Premier League club.

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The Gunners said Kroenke, who joined the board last year and became the largest shareholder in May, paid £1.5 million for another 160 shares at £8,500 each.

Kroenke has leapfrogged Russian billionaire Alisher Usmanov, who was the largest shareholder with about 25 per cent.

The American businessman's shareholding is now close to the 30 per cent threshold that would force him to make an automatic offer for the remaining shares, although he has previously said he is not interested in pursuing a full buyout.

Arsenal have been at the centre of takeover speculation after Kroenke and Usmanov started building stakes.

Earlier this week Usmanov offered to invest £60m for the club to spend in the transfer market, but his plan was rejected by the club's board.