There is a police presence outside the B&M store in the Riverside area of Norwich this morning.
A large cordon is in place around the building stretching from the front of the shop to the homes behind.
Two officers are on scene.
The nature of the incident is currently unclear but police have confirmed it was a serious incident.
More updates are to follow.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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