A 30-year-old man was arrested on suspicion of threats to kill following an incident in Yorke Drive, Newark.
Police were called just before 7.15pm on Monday evening, following reports of a domestic-related incident and concerns for the safety of a man inside a property.
Several people at neighbouring properties were evacuated. They were allowed back into their homes after the property was made safe.
One person was taken by ambulance to Queen's Medical Centre, Nottingham, following the incident.
Two fire crews from Newark and one from Collingham were called at 7.30pm. They remained at the scene until 10.30pm.
Diversions were also put in place to prevent traffic from travelling into Yorke Drive.
A statement from East Midlands Ambulance Service said: "We received a call at 7.37pm on April 16 from our colleagues in Nottinghamshire Police requesting assistance at a medical emergency in a private address in Yorke Drive, Newark.
"We sent a paramedic in an ambulance car, a crewed ambulance and our Hazardous Area Response Team, and one patient was taken to Queen's Medical Centre."
Gill Dawn, a district councillor for the area, said: “For a close-knit community like Yorke Drive, it’s a shocking thing to happen and for people to come to terms with.
“From what I understand the emergency services were first rate again.
“I’m just glad that the situation did not deteriorate further.”