South Korea raises alert after hackers attack broadcasters, banks

SEOUL (Reuters) - South Korean authorities were investigating a hacking attack that brought down the servers of three broadcasters and two major banks on Wednesday, and the army raised its alert level due to concerns of North Korean involvement.

Servers at television networks YTN, MBC and KBS were affected as well as Shinhan Bank and NongHyup Bank, two major banks, the police and government officials said. At least some of the computers affected by the attacks had some files deleted, according to the authorities.