TAIPEI – A Taiwan prison has refused to take in a 96-year-old convict, saying that he could not look after himself behind bars, a report said on Saturday.

Sun Hsin-ming, a retired worker at Taiwan Railway Administration, became the island's oldest convict when he received a three-month jail term for illegally occupying the agency's dormitory, the Apple Daily reported.

Sun could have paid a fine to stay out of prison but he insisted on serving the full term in a protest against what he called "unfair justice," the report said.

However, his protest plan fell through when the Taipei prison immediately sent him back to the prosecutor's office on Friday saying he is too old to take care of himself in jail, it said.

Prosecutors were planning to send Sun to a prison hospital ward in central Taichung city to serve the sentence, it added.

"The court is in a mess and won't listen to reason. I am really angry. I haven't done anything wrong," Sun, who uses a cane, told reporters outside the dormitory.