How were the Twelve Disciples killed?

Answer 1

Answer: Burton L. Mack (Who Wrote the New Testament) says that a second-century focus on the apostles saw them imagined to have performed miracles as Jesus did, to have preached as he did and died as he did. Stories of their martyrdom were developed at this time and began to circulate. However, we do not really know how any of the twelve apostles died.

Answer 2

We actually know nothing about how any of the disciples died. In the second and third centuries, various imaginative Christian traditions grew up about the terrible deaths suffered by each of the apostles, all except the apostle John. The tradition that grew up around John was that the emperor had him boiled in oil, but this was unable to harm him, so John was exiled to Patmos and eventually died from natural causes. However, there is no good reason to believe any of these traditions. It is likely that all of the apostles died naturally, without the Roman authorities showing any interest in them