Deputy First Minister Nicola Sturgeon described it as a "breakthrough" moment and said support for independence was growing particularly among Labour voters and women.
"Scotland is one of the wealthiest countries in the world," she said.
"More and more people are beginning to realise that a Yes vote is Scotland's one opportunity to make that enormous wealth work better for everybody who lives here, create more jobs, and protect vital services such as the NHS from the damaging effects of Westminster privatisation."