Terror gas attack on Tube foiled by security agencies

A planned poison gas attack, with the London Underground as a likely target, has been foiled by the security agencies, it was claimed yesterday. The plot allegedly involved detonating a combined chemical and explosive “dirty bomb”, producing fumes that can choke victims in a confined place. The conspiracy was uncovered after British and United States intelligence intercepted telephone calls within this country, as well as calls to Pakistan. As well as Tube trains, passenger terminals at London Gatwick and Heathrow airports are believed to have been in the list of targets. However, it is believed the plot was exposed before the alleged terror cells had reached the position to carry out an attack. Security sources said yesterday that the attack involved the use of a chemical called osmium tetroxide in an explosion. However, security experts last night questioned whether such a chemical could be used in an attack by terrorists. Full Story