What did the spokesman of IZH announce?

In a sensational development, a spokesperson for the giant steel-making corporation IZH, which until recently has been considered one of the driving forces behind Canada’s industrial growth, announced that IZH’s board of directors has suspended the Chief Executive Officer and the head of financial services. The spokesperson declined to answer questions or go into details regarding the suspension. However, we have learned of several relevant facts. Our senior business and finance editor has been contacted by a senior member of IZH’s Accounting Department. This person, who wishes to remain anonymous at present, has provided details of an alleged large-scale accounting fraud. Federal police and tax agents have begun an investigation which may take months, if not years, to complete.
Number 80.What did the spokesman of IZH announce?
Number 81.How did they learn of the facts?
Number 82.According to the speaker, how long will the investigation last most probably?