Moment The Oxford United player is booked in the FA Cup defeat by Arsenal to spark a betting investigation

Oxford United defender Ciaron Brown escaped punishment for challenges against Arsenal’s Bukayo Saka and Takehiro Tomiyasu ahead of the yellow card that sparked an FA probe into suspicious betting patterns.

Sportsmail exclusively revealed the FA have a dossier of evidence relating to alleged corruption, including alleged phone messages ahead of Monday night’s FA Cup third round kick-off at the Kassam Stadium.

The news claims Brown has been booked into a betting scam that is said to have cost a bookmaker more than £1,600.

The FA investigate allegations of spot-fixing by Oxford United’s Ciaron Brown (right)

Brown is said to have been booked on purpose in the FA Cup third round against Arsenal

One message is said to show a bet slip betting around £200 on Brown being booked at odds of 8-1.

Brown, a 24-year-old Northern Ireland international defender, was booked in the 59th minute for a foul on Arsenal striker Eddie Nketiah and then delayed the restart.

But twice in the first half, just a few seconds apart, Brown afforded tackles that could have led to a yellow card.

In the 25th minute, he first tries to deliberately pull Saka’s jersey back when the Arsenal man broke away from him in midfield.

Twice in the first half, within seconds of each other, Brown evaded punishment for tackles against Bukayo Saka – in the first here he deliberately tugged on the Arsenal player’s shirt

A few seconds later, Brown punches Saka at the ball but the Arsenal man falls to the ground

The game was eventually stopped to allow Saka treatment, but Brown was not penalized

Brown then wins the ball in front of Saka further up the field but the England striker falls to the ground and remains prone despite what appears to be minimal contact.

Referee David Coote stops play to allow Saka treatment but does not penalize Brown.

Just before that, Brown appears to have elbowed Arsenal right-back Takehiro Tomiyasu during an aerial challenge for the ball.

In the 59th minute, Brown received his yellow card for fouling Nketiah and delaying the restart.

Brown also appeared to catch Takehiro Tomiyasu with an elbow during an aerial challenge

Brown eventually received a yellow card for a foul on Arsenal striker Eddie Nketiah and then delayed the restart of play

Brown received the booking in the 59th minute of the game which Arsenal would win 3-0

The yellow card was waved after Brown prevented Arsenal from taking a quick free-kick

The result was still goalless at the time, but Arsenal would go on to win 3-0 thanks to a Mohamed Elneny goal and a brace from Nketiah, setting up a fourth-round match against Manchester City.

It’s unclear how many bets have been placed on Brown being booked and what other bookmakers’ liabilities are, but the FA takes the matter seriously.

told by eyewitnesses at the game sports mail They saw several Arsenal fans celebrate after Brown was booked and some of them boasted about having gained hundreds of pounds.