U.K. listed law firm Gateley said it is “currently managing managing a cyber security incident” after discovering an intrusion into its systems.

The U.K. Top 50 firm said in a statement on the London Stock Exchange that the intrusion was “quickly identified” by its IT team, which acted immediately to secure its systems. The firm said it is “confident” that its security controls were effective in limiting the impact of the incident, and the firm’s board has seen “no evidence” that the firm’s financial performance has been impaired.