According to Bloomberg, both the airline and travel reservation firm Sabre appear to have been the subject of recent breaches.

Sabre, one of many largest clearinghouses for journey reservations, is a probably wealthy goal for state-sponsored hacks due to the corporate’s position as a central repository of what it says are data on greater than a billion vacationers per yr throughout the globe.

The company said it has found no evidence that the incident compromised “sensitive protected information, such as credit card data or personally identifiable information”, but the investigation is continuing.

Sabre was created as the reservations subsidiary of American Airlines, which spun off Sabre as a separate company in 2000.

In a filing Tuesday with the Securities and Exchange Commission, Sabre said that “we recently have been made aware of a cybersecurity incident involving several servers managed by a third party”.

However, American Airlines spokesman Casey Norton said the company has found no evidence that customer data might have been compromised.

Hackers linked to China have breached the Sabre network, Bloomberg reported Friday, citing anonymous officials who are familiar with federal investigations into the matter.

Incidents for the online travel companies were usually following incursions by China-based hackers that in fact recently specified insurance company Anthem Inc (ANTM.N) as well as having the Simply.S. government’s that workers workplace, Bloomberg informed on Friday, mentioning people at large acquainted with the studies.

The attack on The US Office of Personnel Management laid bare 21.5million Social Security numbers and background checks containing sensitive information in June 2014.

The developments were first reported by Bloomberg.

“Anytime you have a close partner that you work with who acknowledges a security incident, you redouble your efforts and go back”, Norton said. Sabre Corp. has confirmed their systems were definitely breached while American Airlines is not so sure they were affected. “I am confident that American Airlines will do all they can to keep our information safe and secure as the threat on cyber security becomes more apparent”.