The men have been bailed to various dates while investigations are conducted 'at senior level'. The men, all constables in their early twenties, have been suspended from duty.
Scotland Yard said: 'A female member of staff has alleged that she was sexually assaulted in a section house.
'The allegation was made on Monday . . . An immediate investigation was launched and the woman was taken to a rape support suite where she is still being cared for.'
The secretary has alleged that the offences took place at the weekend after she had been drinking with the men at a pub.