The 72-year-old was taken to a police station for an interview, the Metropolitan Police said.
Lord Peter Mandelson has been arrested on suspicion of misconduct in public office.
The Metropolitan Police said the 72-year-old was taken to a London police station for interview on Monday.
The former Labour minister has been accused of passing sensitive information onto paedophile financier Jeffrey Epstein during his time as business secretary.
Two of his properties were previously searched by police in connection with the allegations, which surfaced following the US Department of Justice’s document dump related to Epstein last month.
