Cllr David Finch, Leader of Essex County Council, said: "We are aware of historical child abuse concerns in relation to individual members of staff employed by Essex County Council in the 1980s and early 1990s.
"We know that concerns were investigated at that time by the Council and Essex Police, and appropriate actions were taken in accordance with the evidence available and convictions secured.
"However, these are clearly very serious allegations. As the Chief Constable of Essex has said, at present we have allegations but no suspects, victims or locations. If anyone has information or can help this review, we urge them to come forward and speak to the police or other specialist agencies who provide support and advice to the victims of child sexual abuse."