Peter Murrell, the husband of former Scottish First Minister Nicola Sturgeon, has been arrested over campaign-finance allegations, BBC News and other media outlets reported.
Police Scotland said in a statement that a 58-year-old man was arrested as a suspect in connection with the ongoing investigation into the funding and finances of the Scottish National Party.
The statement said officers are also carrying out searches at a number of addresses as part of the investigation. Murrell was the former chief executive of the Scottish National Party, quitting in March.
Sturgeon resigned in February after eight years in power. At the time, she did not cite a specific reason for doing so.
Last month, the governing Scottish National Party elected Humza Yousaf as its new leader.
