Fire crews were called to Ipswich Hospital after reports of smoke this morning.
Emergency services were dispatched at 9.42am on Friday to the hospital in the east of the Suffolk town.
Crews from Ipswich East, Princes Street and Woodbridge fire stations were in attendance.
According to a spokesman for Suffolk County Council, crews attended after smoke was reported in the building.
The service was using thermal imaging cameras to identify the cause.
A 'stop' call was put in place at 10.19am.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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