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
Brent crude was down 80 cents, or 1.1pc, at $69.79 a barrel by 1:10 p.m. EDT (1710 GMT) after falling to $68.14 earlier in the sessions. U.S. oil fell by 87 cents, or 1.3pc, to $67.57 after reaching lows of $65.73.