Oil prices edged higher on Tuesday ahead of a trip by US President Joe Biden to the Middle East that is likely to involve balancing support for Israel with trying to prevent any regional escalation of its war with Hamas. Following a drop of more than a dollar on Monday, Brent futures rose $0.74 to $90.39 a barrel at 10:40 a.m (1440 GMT). US West Texas Intermediate (WTI) crude rose $0.69 to $87.