(Reuters) -Legal and professional services group Gateley reported a cyber security breach from a known external source on Wednesday, adding it was confident that the incident was limited to a small portion of its data.
Shares of the London-listed company fell 7.8% to 184.9 pence by 1244 GMT.
The British company said the impacted 0.2% of its data was traced and deleted from the location to which it had been downloaded and there was no evidence at the moment to suggest the data had been further disseminated.
Gateley does not expect any impact on its financial performance and daily operations from the breach, the company said, as it tries to restore the systems.
The company also plans to update clients' whose data has been impacted as the investigation progresses.
The commercial legal services firm said it had informed relevant regulators and law enforcement agencies along with the country's Information Commissioner's office about the breach.