Sussex Police have issued an apology to fans of Brighton and Hove Albion and Crystal Palace, after falsely claiming that weapons were discovered at their recent game.
Police had tweeted that weapons were found at Brighton's Amex Stadium following the recent derby match, a source of fierce rivalry for the two sets of supporters.
However Sussex Police have now released a statement which reads: "The reference to weapons being found discarded at the stadium following the Brighton v Crystal Palace match on November 28 was based on information logged by our officers on the night and done so in good faith.
"Subsequently, it has been established that no such items were physically recovered at the stadium or in the city. We accept that this information was incorrect and the tweet published earlier today (December 7) by one of our officers was wrong.
"Sussex Police apologises to both clubs and their supporters."
Last month's match, which ended in a 0-0 draw, was the first time the two clubs have met in a league match since the Premier League was founded in 1992.
The two clubs are separated by around 50 miles, but became rivals during the 1970s when they were competing for promotion. The recent match was attended by a heavy police presence, and vandalism was witnessed on buildings around the Brighton stadium.
The two clubs are due to meet again in the FA Cup next month.