There will be "no coalitions, no deals and no pacts" between Labour and the SNP in the event of a hung parliament after the general election, Kezia Dugdale has said.

The Scottish Labour leader dismissed "the idea of a progressive alliance" between the two parties and said Nicola Sturgeon's party could either choose to back a prospective Labour budget at Westminster or not.

It comes after the First Minister suggested that such an alliance, pursuing "progressive policies", could be possible between her party and Labour if the vote on June 8 leaves no single party with a majority of seats.

But when asked by STV News whether Labour would enter into talks with the SNP if there was a hung parliament, Dugdale said UK leader Jeremy Corbyn "doesn't support this idea of a progressive alliance because he doesn't accept the SNP are a progressive party".

She said: "The SNP have said this week already that they are the party to back if you want to end Tory austerity, but they can never be in power in Westminster.

"It is the Labour manifesto which puts forward a platform to end austerity across the United Kingdom, and therefore surely the SNP would have to back it."

Pressed on whether this meant the SNP would simply have to either vote for a Labour programme of government or not, the Scottish Labour leader replied: "Correct."

"If they reject it we will end up with a Tory government again," she added. "We've seen that before - we saw that in 1979."

Dugdale continued: "If we are in a position where we are the largest party seeking to form a government across this country, it will be built on a manifesto that has a clear, costed plan to end austerity.

"The SNP can either choose to back that or not, it's very simple.

"There will be no coalitions, no deals and no pacts."

Recent polls have suggested a tightening of the race between Theresa May's Conservatives and Jeremy Corbyn's party, following early predictions of a Tory landslide.

A model by pollster YouGov has projected that the Conservatives could lose their slim majority in the House of Commons while still being the largest party, meaning they would either have to enter into a minority government or form a coalition.

If they were unable to do so, Labour could have the opportunity to try and form their own government, potentially with a coalition or a more informal deal with one or more other parties.

A recent STV poll conducted with Ipsos MORI showed Labour on equal pegging with the Conservatives in Scotland, with 25% of the vote.

However, it also suggested the SNP are on course to hold 50 of the 56 seats the party won in the 2015 general election - which could make Nicola Sturgeon's party kingmakers if there is a hung parliament.

Asked by ITV's Robert Peston on Wednesday if he would enter into negotiations with other parties in such a scenario, Jeremy Corbyn replied: "You'd better ask me that on June 9."