The Wellcome Trust has fallen victim to an email data breach, the charity has said.
In a statement issued this morning, the healthcare charity said four staff members’ email accounts were compromised on 13 August.
It said it had reported the issue to the Information Commissioner’s Office, the Charity Commission and the police.
"We are contacting people who we believe were in correspondence with the affected accounts," the statement from the charity said.
"We are investigating the cause of this breach and have taken measures to ensure it does not happen again."
A spokeswoman for the Charity Commission said the charity had submitted a serious incident report relating to a serious data breach.
She said the commission was assessing the report to see what, if any, regulatory role there was for the regulator.
A spokeswoman for the ICO said: "Organisations have a legal duty to ensure the security of any personal data they hold.
"We are aware of an incident involving the Wellcome Trust and will be making enquiries."