Lee Miles of the National Cyber Crime Unit (NCCU) has said his agency is working with international Partners to find the source of the malicious emails:
The NCA are actively pursuing organised crime groups committing this type of crime.
We are working in cooperation with industry and international partners to identify and bring to justice those responsible and reduce the risk to the public.
More top news
Hayley Cowan was sentenced to four months and banned from keeping animals for life after killing Staffordshire Bull Terrier Beau.
The High Court has ruled the prison segregation of two terrorists was unlawful although it rejected claims their human rights were abused.
Michel Platini has formally announced that he intends to stand for the Fifa presidency when Sepp Blatter vacates the position