Two people have been arrested over a stabbing at a cinema in Nottingham city centre.
A 20-year-old man was taken to hospital from Cineworld at 20:15 GMT on Sunday, after a fight at the entertainment complex.
Police said his injuries were not life-threatening and he has since been discharged from hospital.
A 16-year-old boy and a 23-year-old man are in custody on suspicion of the possession of a bladed article.
The teenager was also arrested on suspicion of causing grievous bodily harm.
Passer-by Amy Fearnside described the moment eight police officers arrived wearing stab vests and went into The Cornerhouse complex.
“We only knew what happened as my boyfriend heard a teenager on his phone asking to be picked up as someone had been stabbed,” said the 38-year-old from Strelley, Nottinghamshire.
“There was no panic, people were just carrying on as normal. A few people were coming out of the building, but not running or anything.”
Supt Ross Cooke, of Nottinghamshire Police, said: “Our officers have acted quickly to establish the circumstances around this incident leading to two arrests and the recovery of a knife.
“Isolated incidents such as this are incredibly serious and as a force we are committed to ensuring that appropriate action is taken to keep people safe and bring to justice those responsible.”
A spokesman for Cineworld said: “The safety and security of our customers is our absolute priority and we take incidents of this nature extremely seriously.
“We are doing all we can to support the police’s investigation.”
Anyone who witnessed what happened has been urged to contact Nottinghamshire Police.