Emergency services including the air ambulance were called out to a medical incident in Dereham.
A Norfolk Police spokesperson said officers attended to assist with the landing of an air ambulance in the town.
A Quebec Road resident said they saw a helicopter fly low over their house at around 2.16pm on Thursday, June 24 and hovered over the Cherry Tree car park on Theatre Street, before taking off.
They added that they heard "very loud" sirens in the background.
A police spokesperson said it was a medical incident.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here