Nicola Sturgeon’s husband has been arrested as part of an investigation into the funding and finances of the Scottish National Party.
Peter Murrell is currently in custody and is being questioned by detectives.
It comes as Police Scotland investigates the spending of money which was earmarked for Scottish independence campaigning.
A Police Scotland spokesperson said a 58-year-old man has been arrested as part of an ongoing investigation.
It said officers are also carrying out searches at a number of addresses.
“A 58-year-old man has today been arrested as a suspect in connection with the ongoing investigation into the funding and finances of the Scottish National Party,” it said.
“The man is in custody and is being questioned by Police Scotland detectives.
“Officers are also carrying out searches at a number of addresses as part of the investigation.”
It said a report will be sent to the Crown Office and Procurator Fiscal Service.
Scottish National Party
The SNP said in a statement: “Clearly it would not be appropriate to comment on any live police investigation but the SNP have been co-operating fully with this investigation and will continue to do so.
“At its meeting on Saturday, the governing body of the SNP, the NEC, agreed to a review of governance and transparency - that will be taken forward in the coming weeks.”
A spokesperson for the Crown Office and Procurator Fiscal Service said: "COPFS will continue to work with police in this ongoing investigation.
"It is standard practice that any case regarding politicians is dealt with by prosecutors without the involvement of the Law Officers."
It comes just a week after Humza Yousaf was legally sworn in as Scotland's sixth first minister - replacing Ms Sturgeon after her shock resignation in February.
With reporting from IRN.