Police have launched an investigation after Queens Park Rangers fans were taunted about the London bombings.
Upset QPR fans left the ground early
The club's supporters were subjected to chants including, "You're just a town full of bombers" by Hull City fans.
Hull City chairman Adam Pearson apologised to QPR and promised to ban anyone found to be involved in the abuse during the game on Saturday.
Police said a 21-year-old man from East Hull, arrested for racist chanting, was fined and banned from football matches.
Some upset QPR fans left the KC Stadium before the end of the game.
Both Hull City and Humberside Police are studying CCTV footage to identify those responsible.
One QPR fan, called Val, who was at the game, told BBC News: "Suddenly the Hull fans started shouting songs about the London bombings.
"It was really upsetting. We came out of the ground in tears. I couldn't believe it."
Hull's police commander Ch Supt Sean White, said: "I fully agree with the sentiments of anger and disgust.
"We're talking about 30 to 40 shameless cowards who made these chants towards the end of the game. We're just not going to tolerate them.
"We did intervene and made a number of arrests on Saturday. It has brought a great deal of shame to Hull City.
"What I really need is the support of the public. While we know their faces we don't know all of their names."
'Disappointed and embarrassed'
Mr Pearson has apologised to QPR supporters on behalf the club and said he was "extremely disappointed and embarrassed" about the chant.
"We have clear video footage of the group of youths responsible for this appalling chant, and when we identify and locate them, they will at the very least be banned from the stadium for life, and hopefully with sufficient evidence, they will be liable for official police charges."
He added that two people were removed from the stadium over the chant, and were being interviewed.
A section of Hull City's stadium is to be closed until the police investigation has finished.