SEOUL, South Korea (AP) — A Chinese Internet address was the source of a cyberattack on one company hit in a massive network shutdown that affected 32,000 computers at six banks and media companies in South Korea, initial findings indicated Thursday.

It’s too early to assign blame — Internet addresses can easily be manipulated and the investigation could take weeks — but suspicion for Wednesday’s shutdown quickly fell on North Korea, which has threatened Seoul and Washington with attack in recent days because of anger over U.N. sanctions imposed for its Feb. 12 nuclear test.

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