Scottish nationalist leader Nicola Sturgeon on Tuesday raised the prospect of another independence referendum that could break apart the United Kingdom following the 2016 Scottish election.

Though Scots voted to stay part of the United Kingdom in a Sept. 18 referendum, support for the Scottish National Party (SNP) has surged before a U.K.-wide election on May 7 and opinion polls indicate nationalists will win 35-50 of the 59 seats in Scotland, up from six in 2010.

After losing last year's referendum, the SNP suggested there wouldn't be another vote of its kind for a generation. But Sturgeon raised the prospect of another vote in 2016 after a Scottish parliamentary election.