British security source cites intelligence about type of attack being planned . More than 160 people were killed . A possible Taliban - style attack in or near London is a possibility , CNN learns . Second issue : Increased security precautions in effect at transportation hubs . The threat has hiked to ` ` severe '' for civil aviation , London transport .
British security source cites intelligence about type of attack being planned . A possible Taliban - style attack in or near London is a possibility , CNN learns . Second issue : Increased security precautions in effect at transportation hubs . The threat has hiked to ` ` severe '' for civil aviation , London transport .