The company added all the stores were now operational and it had initiated response protocols detection of the incident. It added an investigation had also been initiated while Federal law enforcement were notified.

Yum, which also owns the Pizza Hut chain and Taco Bell, did not specify which restaurants were impacted by the attack.

The KFC parent said there was no evidence customer databases were stolen even though data was taken from the company's network.

The company said the event was not expected to have a material adverse impact on its business, operations or financial results.

(Reporting by Ananya Mariam Rajesh in Bengaluru; Editing by Krishna Chandra Eluri)