A man in his 20s is being questioned by police
He has been arrested on suspicion of gross negligence manslaughter, police say
Officers are appealing for information as investigations continue
A 27-year-old man has been arrested
An 18-year-old man is being questioned in custody
He has since been released on bail
GMP is appealing for anyone with information to come forward
The attack happened on Saturday afternoon
Police received reports of 'a man wearing an offensive costume'
The latest updates so far