Samsung said Friday that the personal question of some of its customers was stolen from its US computer regulations earlier this year.

In a notice to customers, the South Korea-based tech giant said that in July an unauthorized people acquired information from the systems. In early August, Samsung Definite through its investigation that some customer data was compromised. 

The business said it has since secured the affected systems, hired an outside cybersecurity firm and is employed with law enforcement.

The customer data stolen may have involved names, contact and demographic information, dates of birth and issues registration information, Samsung says. More personal data such as Social Safety numbers and payment card information wasn’t compromised.

Samsung didn’t narrate how many customers were affected, but said it’s in the procedure of notifying those that were.