Passers-by were left in shock and distress as emergency services descended on one of Nottingham's busiest streets following a serious crash.
Police officers were called to the scene just after 2pm on Wednesday, September 18, and Upper Parliament Street has been cordoned off.
A man has been taken to hospital with "serious injuries" following a crash involving an NCT bus.
Around 46 NCT services are being affected by the incident which left Upper and Lower Parliament Street at a standstill throughout the afternoon.
Nottingham City Transport has said there are delays of more than 30 minutes on its Navy 49/50, Green, Orange, Pink, Lilac, Red, Blue, Brown, Yellow, Lime, Purple, Sky Blue, Turquoise.
Some buses are running up to 70 minutes late as a result.
Trentbarton has said its Rapid One, Rainbow One and The Two services have also been disrupted.
Hundreds had gathered around the cordon to look at the scene and spoke to Nottinghamshire Live of their shock.
'I don't think I've seen the city centre like this before'
Harry Dean, 19, a student of the city centre, said,: "It's crazy and really sad news. My thoughts are with the person.
"The traffic is really bad but that's understandable. This is a really busy road."
Alan Harvey, 44, of Edwalton, added: "It's very sad to see this. Our emergency services are great and are on hand to help.
"My thoughts are with everyone involved in it. I heard the air ambulance but it didn't land. It was absolutely crazy."
Debbie Gates, 59, of Sneinton, said: "A man got hit by a bus. It was awful.
"The air ambulance tried to land in Old Market Square but it couldn't land and went somewhere else. It was so loud. I don't think I've seen the city centre like this before.
"Loads of people are wondering what's going on. There was an ambulance and loads of police are still here as you can see. I really feel for anyone involved."
A woman at the scene who didn't wish to be named said: "It is just awful. The police look like they're doing well to sort things out.
"It's not what you want to see or hear about. The fact the air ambulance came gives you shudders."
What have police said?
Nottinghamshire Police were called at around 2pm today following reports of a serious collision involving a man and a bus in Upper Parliament Street.
Upper Parliament Street has been closed in both directions following the incident.
A man has been taken to hospital for treatment of serious injuries.
An air ambulance attempted to land in The Old Market Square in connection with the incident but was redirected to Forest Recreation Ground.
Drivers are encouraged to avoid the area while officers conduct their investigation and clear the road.
What has NCT said?
A NCT spokesman told Nottinghamshire Live: "Nottingham City Transport are co-operating fully with the investigation in to the collision on Upper Parliament Street on the afternoon of 18 September 2019, but until the investigation is completed, it is inappropriate to comment any further at this stage."
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