SEOUL - The source of a massive cyber attack that caused three South Korean broadcasters and two banks to go offline for most of Wednesday afternoon (KST) was domestic, the Korean Communications Commission (KCC) said today.

The internet watchdog had previously announced that a Chinese IP address was behind the attack, leading many to speculate that North Korea had conducted a sophisticated and coordinated hacking operation against the South Korean capital. A website operated by LG was also targeted, in what some analysts now argue appears to have been entirely coincidental.