Shares across Europe have risen, helped by a rally in oil prices and hopes of more stimulus action by central banks.

World economic growth lost momentum in September, with China's factory output shrinking again, euro zone manufacturing growth slowing, and US activity steady.

Chinese police are investigating four securities brokerage firms for possible stock manipulation amid market turmoil.

Asian stocks slumped to three-year lows as a slump in Chinese equities gathered pace, hastening an exodus from riskier assets as fears of a China-led global economic slowdown churned world markets.