Brent crude futures dropped 25 cents, or 0.4%, to $70.80 a barrel by 0525 GMT, while US West Texas Intermediate (WTI) crude futures fell 28 cents, or 0.4%, to $67.26
Brent crude futures climbed $1.16, or 1.8%, to $66.34 a barrel by 0430 GMT, after hitting the lowest level since May 21 of $64.60 earlier in the session