A 24-year-old man has died from stab wounds after being found in a street in Ipswich, Suffolk.
He was found outside Zest nightclub and taken to hospital in the early hours of the morning but later died.
In another incident which police are currently treating separately, a 25-year-old man in the nightclub was shot in the shoulder and legs.
Two other men from Stanway, in Essex, were also treated for gunshot wounds after being injured in the club.
The area around Princes Street has been cordoned off and people inside the club at the time of the alleged incidents have been questioned.
A Suffolk Police spokeswoman said officers had yet to establish whether all the men had been inside the nightclub, but said the incidents all appeared to be "linked to the nightclub in some way shape or form".
She said: "We are treating these incidents separately at the moment, but we are keeping an open mind as to whether they may be linked."