A trove of Chinese antiquities described by a spokesman as “a highly important part of our collection” was stolen last week from the University of Cambridge’s Fitzwilliam Museum, The Telegraph and BBC News reported. The museum declined to place a monetary value on the 18 stolen items, but a police spokeswoman said they were believed to be worth “millions of pounds.”

The theft marks the second time in less than a month that Chinese antiquities have been stolen from a British university museum. Two items from the Qing Dynasty, valued at more than $3-million, were taken on April 5 from Durham University’s Oriental Museum. The police official leading the inquiry into the Cambridge theft refused to say whether the two crimes might be linked.