Police are searching a Berkshire property belonging to Sir Cliff Richard in relation to an alleged historical sex offence.
No arrests have been made and Sir Cliff is not at the property.
A police spokesman said the allegation involved a boy under 16 and dated from the 1980s in the South Yorkshire area.
The search is not connected to Operation Yewtree, police said, but officers from that operation have been notified.
The singer, born Harry Webb, is one of the most successful British musicians of all time.
He has sold 21.5 million singles - more than any other male British artist - and is the only performer to have had at least one UK top five album in each of the last seven decades.
He has represented the UK in the Eurovision song contest twice and in 2013 released the 100th album of his career.
He was knighted in 1995 and performed at the Queen's Diamond Jubilee concert at Buckingham Palace in 2012.
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BBC News - Sir Cliff Richard's Berkshire property searched by police
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