Her comments come as the SNP's economy spokesman, Stewart Hosie, says it has sent a letter calling for such a probe.
The development comes as the row over Google's tax affairs in the UK and elsewhere intensifies.
Meanwhile, Google has written to the Financial Times defending its £130m deal, saying it complies with the law.
"After
a six-year audit we are paying the full amount of tax that HM Revenue
and Customs agrees we should pay... Governments make tax law and tax
authorities independently enforce the law, and Google complies with the
law," Peter Barron, the company's European public affairs chief wrote.



