PYONGYANG, North Korea — North Korea warned Saturday that its military is ready to attack Seoul’s presidential palace unless South Korean President Park Geun-hye apologizes for “treason” and publicly executes officials responsible for what Pyongyang says are plans to attack its leadership.

The warning, issued by state media in the name of a unit of the Korean People’s Army, is the latest in a barrage of threats against Washington and Seoul over joint military drills now underway that the North sees as a dress rehearsal for invasion. It also came shortly after a North Korean propaganda outlet posted a video depicting a nuclear attack on Washington, D.C.

The joint military exercises are held annually, but tensions are particularly high this year.

The warning Saturday said the South Korean presidential palace is within striking range of the North’s artillery units, and that if an order to attack is made it is “just a click away.”Pyongyang has previously issued similar threats without following through.