COVID-19 pandemic second round fears

Fears of second virus outbreak hit shares

In the US, the three main financial indexes saw their worst day in weeks, with the Dow Jones Industrial Average down almost 7%.

The decline came a day after America's central bank said the US faces a long road to recovery.

They follow a weeks-long rally that had helped shares recover some ground from March lows.

Energy and travel stocks were among the biggest losers, as oil prices also took a hit.