A man has been arrested after a group of people armed with knives were seen fighting in Leeds city centre.
Police have told people in the area that there has been a stabbing.
Details are still emerging but police have officially said that they were called to the area around Nuffield Hospital at 8.50pm to reports of a group of around five people fighting with knives.
The group dispersed and one man has been arrested.
Officers have cordoned off a section of Leighton Street, in front of Nuffield Hospital, and a stretch of the pavement in front of Leeds Magistrates Court.
A man who works nearby said: "I was out for a cigarette and heard a lot of shouting and then a police van went around the corner.
"I went to look and saw them rugby tackle a man to the ground and take another guy off for treatment.
"I've been told there was a stabbing, with some people saying they have seen a sword."
Yorkshire Ambulance Service attended and a victim is believed to have been taken to hospital.
Staff at Nuffield Hospital have been unable to get to their cars in the underground car park due to the cordon.