Oil at six-week high on Gulf of Mexico storm, Iran tensions

LONDON (Reuters) - Oil prices hit a six-week high on Thursday as oil rigs in the Gulf of Mexico were evacuated ahead of a storm, while an incident with a British tanker in the Middle East highlighted tensions in the region.Brent crude futures were up 40 cents at $67.41 a barrel by 0947 GMT. Earlier in the session they hit their highest since May 30 at $67.65, after ending Wednesday up 4.4%.U.S. West Texas Intermediate crude futures were up 31 cents, at $60.74 a barrel, having earlier touched..