Tottenham Hotspur fans have defied police warnings not to use the Y-word in chants.
The Metropolitan Police said they would be "on the look out" for football supporters who used the word during today's home game against West Ham at White Hart Lane.
The Spurs supporters chanted "We'll sing what we want" and "Yid Army" at this afternoon's match.
The Met said that as of 5pm, no arrests had yet been made. Officers had been speaking about the issue with fans on their way into the stadium.
More top news
British police have closed some traffic outside the road leading to 10 Downing Street.
Metropolitan Police officer, Tom Harrison, has been crawling the course since the race began on Sunday morning.
The Old Bailey heard how Syed tried to get weapons online, including a bomb vest, and trawled the web to find a busy area launch an attack.