Users of LG Uplus, the telecommunications operator owned by LG Corporation, suffered from network outages on Sunday, possibly due to distributed denial-of-service(DDoS) attacks. 

According to LG Uplus, a connection failure occurred at around 2 a.m. on Sunday for 19 minutes, before another such disruption was detected at roughly 6 p.m. for some 20 minutes. 

The glitch paralyzed credit card transaction systems in some superstores and a number of small businesses. 

There were also reports of disruptions for wired internet use with computers and smart TVs.

The network operator believes DDoS attacks were behind the latest connection failures.