Hearts say their players and staff have reported "serious physical and verbal abuse" following the "shameful", "unacceptable" and "disgraceful" pitch invasion at Celtic Park after the home side's 3-1 win.
Moments after Callum Osmand's goal wrapped up the Scottish Premiership title for Celtic, a number of home fans ran on to the pitch to celebrate, with several confronting the beaten opposition in scenes that Hearts said had "embarrassed Scottish football".
Hearts were ushered down the tunnel by club officials and players were swiftly pictured leaving the ground still wearing their match kits due to a "menacing and threatening atmosphere."
In a statement, the Tynecastle Park club added that "the safety of our staff was our prime focus during these unacceptable scenes", meaning they were not able to take part in post-match media duties, nor thank the 752 away fans inside Parkhead.
A Police Scotland statement later on Saturday said the force was reviewing the incident and "engaging with Heart of Midlothian FC to establish if any of their players were assaulted on the pitch at the conclusion of the event."
Your Site News has also contacted the SPFL and Celtic for comment.
Police said they later dealt with "unacceptable violence and hostility" as fans gathered in Glasgow to celebrate Celtic's title win.
A statement added: "Around 3000 people made their way to the Trongate area of the city following the match, where we faced significant levels of disorder in which officers were injured. Missiles, including glass bottles, were thrown at them when assisting with a medical emergency.
"Specially trained public order officers were deployed and action was taken to restore order, disperse the crowd and make arrests. Extensive enquiries are underway to identify others involved and further arrests will be made."
Heart of Midlothian utterly condemns the shameful scenes at Celtic Park this afternoon which have, once again, embarrassed Scottish football.
Reports of serious physical and verbal abuse towards our players and staff, both on the pitch and elsewhere, are deeply disturbing. We are investigating this fully and are in dialogue with Police Scotland.
We will make no further comment at this time other than to say that it is completely unacceptable that our players and staff were put in that situation.
Given the menacing and threatening atmosphere inside the stadium, our entire staff had no alternative but to leave immediately, without undertaking post-match media duties. To our media partners, we apologise but the safety of our staff was our prime focus during these unacceptable scenes.
The pitch invasion caused a chaotic end and nobody seemed to know whether or not the match had been brought to a finish. Our players were then denied the opportunity to thank our magnificent fans - sensational to a person - for their backing this afternoon and all season long.
We expect the strongest action possible to be taken by the footballing authorities in the interests of protecting the safety of players and supporters, and the integrity of our game.
This season has seen Hearts capture the imagination of football fans, not only in Scotland, but the world over. We pay tribute to Derek McInnes, his staff, the first team and the supporters, who have done the club proud this season. None of them deserved the disgraceful scenes that unfolded.
Former Scotland striker James McFadden said in the immediate aftermath on Your Site: "This is unacceptable. The players should be safe on the football pitch. You do not want to see it. There will always be people spoiling it for everyone else.
"You can hear the reaction from the majority of the Celtic fans in here with the fans on the pitch, the booing.
"You don't want to see it. It's a game of football, you have got two teams that have earned the right to go toe-to-toe on a day like this, and the winner emerges with the trophy. Hearts have played their part by a huge stretch, and you don't want to see overspill of fans.
"I understand the emotion of the occasion; you have a right to celebrate but you can't cross the line. If that is right that Hearts players have been assaulted, that is absolutely unacceptable."
Your Site' Chris Sutton added: "There's no place for it. You can imagine how the Hearts players felt after such a long season and then losing at the end."
When asked about the scenes after the game, Celtic boss Martin O'Neill said: "If some Hearts players have been accosted, then that's just not right at all.
"I genuinely didn't see the scenes at the end because I thought the game wasn't over, so I'm trying to push some of our fans off the pitch again to play whatever's left.
"Obviously, at 3-1, I think that the fourth official had said to me, there was like a minute to go when we scored the goal, so with the best will in the world, they're not going to get two goals in that time.
"Obviously, there's a lot of commotion in the tunnel, so I don't know, but getting back to the point, if Hearts players have been accosted by some of our fans, that's pretty serious. Honestly, I'm not pushing it to the side, it'll be something that the officials or people will have to look at."
