Former Scottish First Minister Nicola Sturgeon is in police custody in connection to an investigation into the Scottish National Party's finances.
Police Scotland confirmed “a 52-year-old woman was arrested today as a suspect” in the investigation and is being questioned by detectives.
A report on the questioning will be sent to the Crown Office and Procurator Fiscal Service.
The investigation concerns the spending of approximately £600,000 raised by supporters specifically for campaigns regarding Scottish independence.
It is understood there have been complaints the ringfenced cash may have been spent elsewhere.
Ms Sturgeon’s husband, former SNP Chief Executive Peter Murrell, was also arrested last April in connection to investigation, alongside former SNP treasurer Colin Beattie.
Both Mr Murrell and Mr Beattie were released from custody without charge pending further inquiries.
Police have previously searched the SNP headquarters and Ms Sturgeon and her husband’s home as part of the investigation.
A £100,000 motorhome was also seized from outside the home of Mr Murrell's mother in Dunfermline, Fife.
Previously, the SNP said it is cooperating with all police investigations and will continue to do so.
Police Scotland warned that the investigation is active and the public are advised to exercise caution if discussing it on social media.