Several people were arrested by Suffolk police before and after Sunday’s Derby between Ipswich and Norwich, according to Sky Sports.
Chief Superintendent Louisa Pepper said “a very small minority” had to be dealt with for a range of offences including suspected drugs possession and having a lit flare inside Ipswich’s Portman Road ground, where the Sky Bet Championship rivals fought out a 1-1 draw.
Suffolk police said some people who were treated by medics for the effects of the flares are now well.
A 23-year-old Norwich man was arrested on suspicion of possession of class A drugs, while a 23-year-old man from Colchester and a 57-year-old man from Witham were arrested for breaching a notice to leave following a bout of anti-social behaviour.
A 29-year-old man from Felixstowe was held on suspicion of affray and a 23-year-old man from Norwich was arrested on suspicion of assault.
All of those arrested were taken into custody at Martlesham Police Investigation Centre.