According to a news report by CNN, South Korea’s Banks and TV stations system outage could be due to a cyber attack from the North.

One television station, YTN, reported that 500 of its computers had been disabled by the outage. Another, KBS, said that its internal networks had been “paralyzed,” but that the problem didn’t prevent it from broadcasting live.

A third broadcaster, MBC, was also reportedly experiencing problems.

Customers of Shinhan Bank are unable to log into the lender’s website at the moment, the company said in a statement.

A second lender, Nonghyup Bank, said that it had disconnected some of its computers after they were infected with a virus. The bank said its main server was still functioning and able to carry out Internet transactions.

Police didn’t immediately provide a reason for the server problems.