Brent crude drops 6% to below $91 a barrel, while shares in energy firms BP and Shell slide on FTSE 100

Brent fell about 6 per cent toward US$91 a barrel, while West Texas Intermediate was below US$84. Read more at straitstimes.com. Read more at straitstimes.com.

Oil prices have fallen further in early trading after setting a two-month high set last week