North Korea has rarely aired footage of nuclear-capable missile tests since it started nuclear negotiations with the U.S. in 2018. Now, state TV has strangely broadcasted — and then deleted — footage of submarine-launched ballistic missile (SLBM) tests.

On Saturday, Sept. 12, Korean Central Television (KCTV) repeatedly aired a series of short clips showing SLBM tests before suddenly cutting and replacing the clips later that day. The abrupt deletion could mean that someone in Pyongyang decided they were too sensitive or inappropriate to show.

Here’s what happened: The clips were shown against the backdrop of a song