Viking
Indeed, not that the security at this depot would have been anything like that at a military installation even though the latter would have nothing on the size of the one at HH. However, that could all change regardless of the findings.
wyla
Why? Once one tank was ablaze the resulting heat would have set off a chain reaction in fairly quick succession.
Expert opinion reckons that if not a bomb, the cause may never be known. Whether forensics does/does not find evidence of foul play, If anything, I suspect the police will find out more from examining CCTV images covering the surrounding area, than looking at the ashes.