More than 60 trophies have been stolen from Formula One team Red Bull's factory in Milton Keynes, England.
A group of about six men used a car to drive through the front entrance of the building on Friday night, police said.
Red Bull team principal Christian Horner said staff were "absolutely devastated" by the break-in and the theft of the trophies, which had taken "years and hard work to accumulate".
The Austrian team won the F1 constructors' championship and drivers' championship from 2010-2013
Horner also warned the team would have to limit accessibility to the site in future, accepting the move would disappoint fans.
He added in a statement: "The break-in caused significant damage and was very upsetting for our night officers who were on duty at the time.
"The offenders took items that not only did not belong to them, but which represented the efforts of a group of dedicated, hard-working individuals.
"Beyond the aggressive nature of this break-in, we are perplexed why anyone would take these trophies. The value to the team is of course extraordinarily high due to the sheer hard work and effort that went into winning each and every one.
"But their intrinsic value is low; they would be of little benefit to those outside of the team and, in addition to that, many of the trophies on display were replicas.
"The actions of these men mean it's likely that we will have to make our site less accessible in the future, which will be unfair on the hundreds of fans that travel to visit our factory each year to see our trophies and our Formula One car.
"We would like to appeal to anyone who knows any information on the whereabouts of these trophies or the offenders involved to contact Thames Valley Police."
Police said they were called at 1.30am on Saturday following the robbery in Bradbourne Drive, Tilbrook.
They said the night staff were "not physically harmed".
A Thames Valley police spokesman said: "Two cars were involved. A silver 4x4 which was used to drive through the entrance and a further dark coloured, black or dark blue Mercedes estate car. Both are believed to have foreign number plates.
"There is no description of the offenders available at this time, although they are all believed to be men, wearing dark clothing.
"If you have any information that may assist the investigation, please contact Milton Keynes Force CID on the Thames Valley Police non-emergency enquiry centre number 101. If calling from overseas, please dial 0044 1865 841148 to contact Thames Valley Police from outside of the United Kingdom.
"If you don't want to speak directly to the police you can contact the independent charity Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org. No personal details are taken, information is not traced or recorded and you will not go to court. Join us on www.thamesvalleyalert.co.uk to receive local crime and safety messages."