South Korean telecommunication operator KT suffered a nationwide network outage on Monday, causing widespread disruptions of various daily tasks based on connectivity, Koreaherald reports.

The company said the latest disruption was caused by a “large-scale DDoS attack in the network.”

KT said it is working to fix the problem as quickly as possible.

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“As of noon, KT appears to have recovered most of its internet services, though disruptions continued in some regions,” reports Yonhap news agency.

Police immediately launched an investigation.

“The cybercrime investigation team of Gyeonggi Nambu Provincial Police Agency is currently looking into the scope of the attacks and the damage,” a police official said, referring to the police agency in Suwon, 46 kilometers south of Seoul.

The official did not provide any other details, including who was behind the suspected cyberattacks.

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