A 15-year-old boy has been arrested by police during the Premier League game between Brighton and Liverpool on Saturday (December, 2)
Sussex Police said the teenager was arrested at the Amex stadium on suspicion of being in possession of a flare.
He has since been released under investigation.
A 37-year-old man from Bexhill was also arrested on suspicion of throwing a missile onto the pitch.
Police said officers and stewards ejected five other people from the stadium during the match.
Brighton lost the game 5-1, their heaviest defeat of the season so far.