Feb. 20 (UPI) -- British police resumed a search of the former residence of ex-prince, Andrew Mountbatten-Windsor, in the grounds of Windsor Castle on Friday, hours after he was arrested and later released "under investigation" on suspicion of misconduct in public office.

Unmarked police vehicles were seen driving into Royal Lodge, Andrew's home for more than two decades until he was relocated by the King to his Sandringham estate two weeks ago, shortly after 7 a.m. local time.

Thames Valley Police officers are combing the sprawling 30-room mansion, set in its own grounds of around 100 acres, three miles south of Windsor Castle, for evidence as part of their investigation into allegations Andrew passed confidential files to Jeffrey Epstein when the former prince was serving as Britain's trade envoy.

Gathering, logging and processing evidence and items founds at the property could take days, according to the BBC.

Thames Valley Police said in a news update that searches it had been carrying out at Sandringham in Norfolk had ended on Thursday evening and that it would "not be making any further statement at this time and will not be holding a press conference or conducting any media interviews in relation to this investigation."