FTSE 100 closes at three-week low
(Close): The London market closed at a three-week low on Friday, with financial and mining stocks seeing some of the biggest falls.
The FTSE 100 index fell 1.86% - to end the day at 6,115.76.
Falling oil and metals prices hit commodity-related stocks, with mining giant BHP Billiton down 3.81%.
Analysts said that uncertainty over the outcome of the UK's referendum on EU membership was also making investors nervous.
"The heightened fears over the impact a Brexit could have in the UK, Europe, and global economy has renewed a wave of jitters that has weighed on global sentiment," said FXTM research analyst Lukman Otunuga.
Yields on German 10-year bonds - traditionally seen as a safe asset - hit a new record low on Friday. Bond yields fall when the price of bonds rise.
In London, Tesco shares dropped 4.02% as the retailer said it had sold the Giraffe restaurant chain and its majority stake in Turkish business Kipa.
Outside the FTSE 100, shares in brewing firm Fuller Smith & Turner fell 3.44% following its latest results. Adjusted pre-tax profits for the year to 26 March rose 12% to £40.9m.
Shares in womenswear retailer Bonmarche rose 1.96% despite its full-year profits dropping to £9.6m from £12.4m. The company said the trading environment had been "particularly tough".