A machete-wielding gang in balaclavas stabbed a footballer during a match in Ipswich on Saturday afternoon.
The victim, in his 20s, is thought to have been playing football at Gainsborough Sports Centre in Braziers Wood Road at 4pm, when the gang ran on to the pitch and attacked him.
The gang then ran away, leaving the victim with wounds to his arm and his hip.
He was taken to hospital for treatment and has since been discharged.
On Sunday morning, Suffolk police confirmed that they had arrested two teenagers, aged 16 and 15, in connection with the attack.
Both boys have been taken to Martlesham police investigation centre to be questioned.
Police saidthe victim and the attackers knew each other.
Suffolk Football Association said in a statement: "We are aware a very serious incident took place at a football match in Ipswich this afternoon.
"We are working with the relevant authorities to fully understand what happened, and supporting those involved. No further comment will be made at this stage."
There are 10 pitches at Gainsborough Sports Centre and several matches were taking place during the time of the attack.
Assington Stanley FC, who were playing against Kesgrave Kestrels at the time, issued a statement wishing the victim a full recovery.
Gainsborough Sports Centre has been contacted by ITV News Anglia and is thought to be open as usual.
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