A POLICE officer suffered a broken wrist after struggling with a man who had pulled a knife on him.
The incident happened during Brighton Pride yesterday.
British Transport police have issued little detail of the incident.
But Chief Superintendent Paul Brogden said on Twitter: "Sorry to hear of serious incident involving knife been pulled on @btp_uk officer during #BrightonPride today [Saturday]. Officer suffered broken wrist.
"[The] suspect was arrested by the officer who injured his wrist whilst struggling with him."
Elsewhere there were around 28 arrests for suspected offences related to possession of drugs, theft, ABH and public disorder.
Tens of thousands came to enjoy the day first at the Pride Parade, then at Preston park and into the night at the Pride Village Party in Kemptown.
Chief Superintendent Nev Kemp, who led the day's policing event said: "This is one of the biggest policing operations we manage, and it could not happen without the support and hard work from all those involved and the thousands of people who travel from far and wide to attend it and help make it an amazing and fun event.
"I was delighted to be able to march in the Parade again this year, which has to be one of the most enjoyable duties I undertake. I am also hugely proud of the officers who have been policing Pride this year, many of whom worked very long and busy shifts but remained positive and professional throughout.
"The overwhelming majority of people who have come to Pride have been brilliant but officers have made a number of arrests today for a variety of offences, which can be expected at such a large event.
"As the weekend continues I would urge people to please take care of themselves and each other. If you have come to the City with friends then stick together, have fun but make sure you all go home together - I don't want anyone to end up with not so pleasant memories of their Pride weekend.
"A visible presence of officers will remain throughout the city with plenty on hand to help if you need it. So, please do not hesitate to approach an officer if you have any concerns or need to report a crime".