Oil prices climbed in early trade on Friday on supply concerns after Yemen’s Houthis stepped up attacks on Saudi Arabia, on track for a fourth straight monthly gain and the steepest since July. Brent crude futures rose 86 cents, or 0.75%, to $115.74 a barrel as of 0122 GMT. US West Texas Intermediate (WTI) crude futures rose 72 cents, or 0.71%, to $102.72. For the month, Brent was on cour