11.   The account bore similarities to claims by Al Fayed.

12.   The letter bore similarities to previous threats, and there were signs it could be authentic, Sturm said.

13.   Police said the gas bore similarities to Sarin, a combat gas developed by Nazi scientists as a chemical weapon.

14.   Police also said they suspected that the gas bore similarities to Sarin, a nerve gas devised by Nazi Germany during World War II.