“The yield (impact) of TATP and its stability also depends on its storage in a cold environment and presence of 10% water. Witnesses have deposed that Umar used to keep his room extremely cool, and that a foul smell used to emanate from it. He and others had also purchased collapsible water bags, which were used to keep the prepared TATP under wet conditions to keep it safe. The post-mortem reports of the victims furnished by the hospital ascertain the cause of death to be “high-intensity blast wave effect”.
The blast, the chargesheet said, led to the death of 11 people and injuries to 29. NIA found that on Oct 30, Umar met an acquaintance behind Al Falah hospital, gave him his room key and asked him to bring his “shoes” from the almirah in the room. “He was already wearing his shoes at the time. While on the run, Umar was storing his urine in a polythene bag, as observed by the woman who owned the house in Nuh where he had sought shelter.
“Interestingly, an innovative method for preparing explosive substances using urea nitrate has been elaborated in a PDF material seized from the pen drives of the accused wherein an alternative method for the source of urea is mentioned as — ‘extracting urea from urine’.” It also mentioned the seizure of a terror manual, “Lone Mujahid Pocket Book”, which was published in “Inspire” magazine, affiliated with Al-Qaeda in the Arabian Peninsula (AQAP), being followed by the module.