Another teenager was arrested in connection using a cyber attack on phone supplier TalkTalk and British Internet that set millions of customers’ data at risk, authorities said.

The 16-year old lad from Feltham in west London was held on Thursday after a hunt of his residence on suspicion of computer abuse.

Some four million TalkTalk customers’ private data are worried to have been undermined in eight months in which customers’ data have been stolen in the 3rd cyberattack on the business.

The organization has said it’s uncertain how many individuals were impacted, but said that advice including bank details, addresses and customer names may be at risk.

Authorities are investigating a ransom demand which was sent to TalkTalk purporting to be from the hacker, in the event the demand for cash was real, although the company is uncertain.