New Delhi: The Special Investigation Team (SIT) is all set to send Sunanda Pushkar's viscera samples to London for forensic tests under the Mutual Legal Assistance Treaty (MLAT).

According to Delhi Police sources, a report by AIIMS says that Indian laboratories cannot detect radioactive poisons including Thallium, Polonium 210, Nerium Oleander, Snake Venom, Photolabile poisons and heroin.

Delhi Police earlier contacted UK and US through the Indian High Commission and Embassy but to test samples under MLAT an FIR is necessary. Since an FIR has been registered do the testing becomes legal and will be valid in Indian courts.

According to the latest revelation in the case, a report by AIIMS doctors claims that Sunanda was in relaxed, 'rest sleep' state at the time of her death. The inference of this report could mean that her death was a case of murder.

The AIIMS report states that Sunanda was neither ill nor had any prior disease and was a perfectly normal, healthy human being. The report also claims that she did not have any cardiac problem, hypertension or tuberculosis.