Radiation in Sunanda Pushkar’s viscera samples was within permissible levels and did not cause her death, the FBI has said in a report submitted to authorities .
Sources who have seen the report also said it identified the poison that killed her, but refused to name it at this stage.
The report was delivered in a sealed envelope nine months after the samples were sent to the American investigation agency’s “well-trusted lab” in Washington. It virtually rules out death by polonium poisoning — one of the many theories surrounding the mysterious death of the wife of former Union minister Shashi Tharoor in a Delhi hotel two years ago.
The report also names the radioactive isotopes that were detected in Pushkar’s body during the post-mortem examination but could not be identified in Indian labs, the sources said.
The isotopes may have been generated from a drug that was taken either orally or injected, sources quoted the report as saying.
The findings, which will be studied by investigators and forensic experts here, will shape the next course of investigation in the sensational case.