North Korea has fired artillery across the South Korean border in response to broadcasts made from the South exposing the North Korean government’s brutality.

The North Korean government called the broadcasts “a declaration of war.”  The North Korean volley was aimed at the broadcast locations.  The attack happened about 4 p.m. local time.

The South Korean military responded with artillery fire.  The North did not retaliate but sent a warning that they would carry out military action within 48 hours if the broadcasts did not stop.

“Our military has stepped up monitoring and is closely watching North Korean military movements,” South Korea’s defense ministry said.

The U.S. government, who has about 28,500 military personnel in South Korea, said they are “monitoring” the situation.

“Such provocative actions heighten tensions, and we call on Pyongyang to refrain from actions and rhetoric that threaten regional peace and security,” U.S. State Department spokesperson Katina Adams said.

The nations last traded fire in October 2014 when two patrol boats in the Yellow Sea exchanged fire and was followed by North Korean gunfire later that week.