Anas Sarwar claimed yesterday that the SNP is "mired in scandal" following the arrest of ex-chief executive Peter Murrell.
On the campaign trail in Rutherglen and Hamilton West, the Scottish Labour leader said that the SNP was "known for their lack of transparency".
Murrell, who is married to former first minister Nicola Sturgeon, was arrested on Wednesday morning in connection with an investigation into the funding and finances of the SNP.