Football clubs pay their respects on Twitter on the 25th anniversary of the Hillsborough tragedy

From Manchester United and City to Celtic and Apoel Nicosia, football clubs from around the world have marked the anniversary of one of football's darkest days.

The football world comes together today to remember the 96 victims of the Hillsborough disaster, killed on this day in 1989 after they went to Sheffield to watch Liverpool play Nottingham Forest in an FA Cup semi-final. Liverpool themselves, who will hold a ceremony at Anfield today for the victims, posted this on Twitter seven minutes after midnight.

pic.twitter.com/hfe0xJSnw8 — Liverpool FC (@LFC) April 14, 2014

Celtic posted the same tribute on their Twitter page this morning.

Our thoughts & prayers are with the families of the 96 fans who went to a game of football & never came home. (NM) pic.twitter.com/YSz8yO7FL1 — Celtic Football Club (@celticfc) April 15, 2014

Chelsea posted this

Today we stand with @LFC, remembering the 96 who lost their lives at Hillsborough 25 years ago today. #YNWA — Chelsea FC (@chelseafc) April 15, 2014

Everton also stand with their cross-city rivals

25 years ago today 96 @LFC supporters went to a game but never came home. We will never forget them #MerseysideUnited pic.twitter.com/8BRYYCYhWM — Everton (@Everton) April 15, 2014

  Manchester City also paid their respects

Twenty-five years on Manchester City's global family remembers the 96. #YNWA pic.twitter.com/FIrCxmvNFG — Manchester City FC (@MCFC) April 15, 2014

And fierce rivals Manchester United also marked the day with a classy tweet from their official account.

Today we stand side-by-side with @LFC to remember the 96 fans who lost their lives at Hillsborough on 15 April 1989. pic.twitter.com/DHfql99zs4 — Manchester United (@ManUtd) April 15, 2014

But the impact of Hillsborough went far beyond these islands. Here's a tweet from Cypriot club Apoel Nicosia

Our thoughts are with the 96 & their families & everyone affected by the Hillsborough tragedy 25 yrs ago. @LFC #YNWA pic.twitter.com/OTPEwGJdwh — APOEL FC (@apoelfcofficial) April 15, 2014

As and when more tributes come in, we'll add them to this story.