Parts of Northampton town centre were closed off last night following an incident, according to reports.
Police and ambulance crews were seen outside The Boston in College Street at around 6.30pm last night (Tuesday).
An area was cordoned off outside the venue, heading down towards the Park Inn.
Sol Central was also closed off to the public.
The air ambulance was seen landing in the Upper Mounts car park.
Wayne Baptiste, who lives in the Drapery, saw the aftermath of the incident from his flat.
He said: "There were ambulance there and police; there was was a silver car as well.
"Two men got out of it in a uniform I had never seen before, maybe they were forensics?
"The air ambulance was in the Mounts car park. People could not leave there until the situation had diffused.
"Something serious was happening."