Thousands of staff at Arup have had their personal details put at risk in a cyber attack on a third-party payroll-services provider.

Architects, engineers, planners and project managers at the firm were told that a ransomware attack on Symatrix had exposed their names, addresses and bank account details to hackers.

Arup, which employs more than 6,000 staff in the UK alone, was informed of the breach last month although the attack is understood to have taken place in January. Arup created a specialist team to investigate the extent of the attack before telling staff.

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