The death of a US scientist suspected of anthrax attacks in 2001 was a result of “relentless accusation and innuendo”, his lawyer has said.

A US medical examiner confirmed that Dr Bruce Ivins, 62, killed himself after being told he was about to be charged.

His lawyer said his client’s innocence would have been proved in court.

Officials declined to give details of the probe but sources said prosecutors were to seek the death penalty over the attacks that claimed five lives.

The anthrax, which was posted to media offices and politicians shortly after the 11 September attacks in 2001, made another 17 people sick.