Indices in Europe and Asia slipped as investors searched for safe havens after President Trump escalated his war of words with North Korea. "The level of risk aversion we're seeing suggests traders still believe the prospect of military action is very small but precautions are still being taken nonetheless, as this still has the potential to escalate very quickly and unexpectedly".
The UK blue-chip index closed 113 points, or 1.5%, lower at 7,385, steadily losing ground as the trading session wore on.
In the eurozone, the Paris CAC 40 dropped nearly 0.7 percent to 5,081.92 points compared with the closing level on Thursday.
In the eurozone, the Paris CAC 40 lost 0.6 percent and Frankfurt's DAX 30 shed some 1.2 percent.
Safe havens benefited from the move away from stocks - gold rising again to around $1,290 an ounce after surging 1.3 percent Wednesday - but other risky assets such as oil and copper held their price.
"European shares are trading once again lower. continuing their slide on the back of ever more increasing tensions between North Korea and the United States", added analyst Markus Huber at City of London Markets. Secretary of state Rex Tillerson said yesterday North Korea posed no "immediate threat" and that "Americans should sleep well at night, have no concerns about this particular rhetoric of the last few days". Chinese mainland shares were also down 1.8 percent.
Trump, whose threat this week to bring "fire and fury" was dismissed by North Korea, said Thursday his statement might not have been "tough enough".
The stock market jitters came as North Korea outlined plans to launch missiles aimed at the waters off the coast of the US Pacific territory of Guam.