The Stone Roses have added another date to their comeback tour next summer. The Manchester quartet, who will play four nights at Manchester's Etihad Stadium next June and will headline the T in the Park festival on July 8, will perform at Marlay Park in Dublin on Saturday, July 9.

The news follows speculation that began after mystery posters showing the quartet's lemon logo were noticed around Manchester.

Colin White, owner of Vinyl Revival on Hilton Street in the city – one of the shops with posters of lemons on its door – said he was told there would be an announcement very soon.

All I know is that there's definitely going to be some news regarding the Stone Roses in 24 hours

He told the Press Association: "Everything that's on Twitter at the moment is rumour and speculation, and there will be an official press release or conference within the next 24 hours, and that's all I can tell you."

Mr White said he was asked this morning by a "media company" if they could put the posters on his door, and he said there are about 20 or 30 shops nearby also carrying the posters.

"People said they were playing Glastonbury," he said, adding: "Like I say, all I know is that there's definitely going to be some news regarding the Stone Roses in 24 hours."

Mr White, who is a fan of the band, said he was happy when they played gigs three years ago, and said he could not figure out whether the announcement will be about new material or new shows.

"Even if it's a new album, whether it's a tour, I think it'll make most Roses fans happy anyway, but I think just that there's going to be some news, I think is just the thing that's created the buzz at the moment anyway. They've been very quiet for three years, and for some news to be announced in the next 24 hours is welcome news I think for a lot of people," he said.

A spokeswoman for the band said: "Nothing concrete yet."

With fans speculating about what the news will be, "Stone Roses" is trending on Twitter.

Fronted by Ian Brown, they are often hailed as the inspiration for a generation of bands.

The Stone Roses made a triumphant comeback in 2012, having announced in 2011 that they were reforming after an acrimonious split 15 years earlier.

The reunion was one which many fans thought would never happen after their bitter fall-out.

They had long met rumours of a revival with assurances that the band would not reform.

But they eventually buried the hatchet in 2011, agreeing a series of festival dates and a three-night stint topping the bill at their own mini-festival in Manchester's Heaton Park.

The show was the band's first large-scale show in the UK since the band fell apart in 1996.

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Dates below:

Manchester Etihad Stadium: June 15, 17, 18 and 19, 2016

T in the Park, Scotland: July 8

Marlay Park, Republic of Ireland: Juluy 9