Foreign exchange markets were shaken also, with the ruble falling to a historic low against the dollar.
Asia's main stock indices fell over 3 per cent, with Europe not far behind -- wiping out the previous day's rally seen on hopes of Chinese stimulus. Wall Street opened down around 1.7 per cent.
"It's not a pretty sight (on stock markets) with every single sector in the red... Only serving to prove that yesterday's bounce was a short-lived relief rally," said Brenda Kelly, head analyst at London Capital Group.
New York oil prices today hit fresh 12-year lows below USD 28 a barrel owing largely to a glut of crude that is set to worsen as Iran pumps out extra barrels after the lifting of Western sanctions on Tehran.
The latest slump weighed on share prices of energy companies, while miners suffered also on generally weaker commodity markets.
In London, Royal Dutch Shell shares were down 5.4 per cent, while among miners BHP Billiton slumped 6.6 per cent.
The Anglo Dutch group forecast profit after tax of between USD 1.6 billion and USD 2.0 billion (1.5 billion euros and 1.8 billion euros) during 2015.
This compares with net profit of almost USD 15.0 billion in 2014.
Crude futures have lost three quarters of their value since mid-2014, hit by a perfect storm of a supply glut, weak demand, a slowing global economy and a strong dollar.
The slump in prices has slashed income also for oil producing countries within and outside OPEC.
The worsening economic outlook amid falling oil prices present a serious challenge for President Vladimir Putin, whose pact with voters has been based on years of economic stability and relative prosperity.
Meanwhile in Asian trading today, Shanghai's main stocks index swung in and out of positive territory before ending the day one per cent lower.
The losses were characteristic of the start to a year that has seen world markets slump, wiping trillions off valuations.
