Eleven people are being assessed by medical teams following a chemical scare in Essex.
It's the second time in two weeks the Essex County Council building in The Crescent, Colchester, has been affected by a chemical incident.
A council spokeswoman said: "We can confirm Essex House has been evacuated today following reports of employees feeling unwell.
"Emergency services are on the scene and responsible for leading initial investigations into this incident. We are aware of 11 staff members are being assessed."
It is understood that the building will remain closed for 48 hours while investigations continue.
Essex Police established a cordon around an Essex County Council building in Colchester today following reports of a strange smell in the area and people feeling unwell.
The fire service has been unable to identify any hazardous material.
The East of England Ambulance Service has not been able to identify any particular cause or reason for these people becoming unwell.
In total 29 people were assessed at the scene and then went home, while three were taken to hospital for further assessment.
Cordons are now being lifted.Discussions will now be held with the Health Protection Agency.
If anyone who was involved in today’s incident and has a genuine concern for their health they should ring NHS Direct on 0845 4647 in the first instance to get advice.
Find out more here.
Emergency services are continuing to work down at the scene of an incident in Colchester that has left a number of people who were working in council offices in a building in The Crescent feeling ill.
The Ambulance Service have set up an assessment centre nearby and 25 people were checked over at the scene but did not require further treatment and four people have taken themselves directly to Hospital with sore throats and sickness.
The Essex County Council building in The Crescent has been evacuated and a 400m cordon has been established affecting various roads including The Crescent and Clough Road.
More details here.
An emergency number has been issued for any relatives with concerns for people who have been taken ill in the incident at Colchester this afternoon. They should call 0800 0920410.
Emergency crews are at Essex County Council building in The Crescent after reports were received at 12.40pm of people falling unwell reporting a strange smell.
At least six people have been taken ill and police have set up an exclusion zone after suspected carbon monoxide poisoning at a Colchester business park.
Emergency services were alerted at 12.40pm on Friday after a call from Essex House in The Crescent inSeveralls Business Park