What is the "pyramid curse"?

When scientists discovered the secret tomb of Egyptian Pharaoh Tutankhamun, the door was engraved with the words "Whoever disturbs Pharaoh's purity will be cursed by Pharaoh!" No one took it seriously. While filming Pharaoh's body in the mausoleum, a photographer fell dead and a doctor died in the mausoleum. The cause of death was unknown. Three days after he came out, one person died. A week later, a scientist committed suicide. Before he died, he wrote a suicide note saying, "I was cursed by Pharaoh ... I was in great pain ..." and so on, Tutanka was made to commit suicide to apologize to Pharaoh.