Sam Allardyce has said the West Ham United fans who aired anti-Semitic chants at Tottenham on Sunday should be "thrown out of football".
A section of Hammers supporters made Nazi salutes and hissing noises - mimicking the gassing of Jews in the Holocaust - as well as singing Adolf Hitler chants.
In his post-match press conference Allardyce refused to condemn the songs because he was concentrating on the game - which West Ham lost 3-1.
However ahead of Wednesday's match with Manchester United the Hammers manager clarified why he refused to dwell on the chanting and vented his disgust at the fans guilty of anti-Semitism.
"I had no idea what had been said or done," Allardyce said. "I wasn't prepared to comment on it having not heard what went on. We were in a difficult position and I was not in a good mood. I was expecting to talk about football.
"I was very, very disappointed to hear what went on from a small minority. Nobody condones it. We have zero tolerance at the club and the authorities deal with it. I don't wish to hear any of that chanting. I must stress it is a small minority.
"They should be thrown out of football. A small minority can make themselves heard when they want to. The good thing is with CCTV cameras it's difficult to get away with. They can be picked out and punished accordingly. If we punish people in the right way we will stop it."
West Ham's Jewish co-chairman David Gold echoed Allardyce's "zero tolerance" and revealed he is leading an invetsigation "from the top of the club".
The Football Association has confirmed it is investigating the abusive chants while The Metropolitan police have arrested and cautioned two West Ham fans for making Nazi salutes.
One of the fans has already been identified as a season ticket holder and has been handed a lifetime ban from the club.
WEST HAM MIDFIELDER YOSSI BENAYOUN: