Hull City fans set off a smoke bomb at a pub ahead of Saturday's match against Sheffield United at Bramall Lane.br br On Facebook, the Hull City Protesters Group took responsibility for the smoke bomb, which shrouded the pub in an orange mist seen filming the incident on their mobile phones before chanting supporters exited the building.br br On Facebook, the group posted: "We keep to our word..... pub evacuated in Sheffield due to our smoke bombs #allamsout."br br The hashtag is in reference to Hull chairman Assem Allam.