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Insurer Chubb says investigating a 'computer security incident'

March 26 (Reuters) - Insurer Chubb Ltd on Thursday said the company is investigating a computer security incident that may involve unauthorized access to data held by an outside service provider.

Chubb has no evidence that the incident affected its network, which "remains fully operational," a spokesman said. (Reporting by Suzanne Barlyn; Editing by Sandra Maler)