Tesco Bank, owned by British retailer Tesco, has confirmed that about 9,000 of its customers were affected by an online heist that resulted in a total of £2.5m cash being stolen from their accounts.

The number of customers affected is less than the 20,000 customers originally thought to have been hit by the cyber attack.

The bank said that it has refunded all the affected customers, and confirmed that no personal data was compromised due to the attack.

Soon after the discovery of the online heist, the bank stopped all online transactions.

Tesco Bank CEO, Benny Higgins said: “Our first priority throughout this incident has been protecting and looking after our customers and we’d again like to apologise for the worry and inconvenience this issue has caused.

“We’ve now refunded all customer accounts affected by fraud and lifted the suspension of online debit transactions so that customers can use their accounts as normal.”