Oil down after three-day rally; dollar rise sparks profit-taking

By Barani Krishnan NEW YORK (Reuters) - Oil prices fell on Thursday, snapping a three-day rally after notching another 2016 high, as a strong dollar sparked profit-taking in crude futures by investors. Continuous threats by militants against Nigeria's oil industry and fear of more security incidents that could hit supplies worldwide, however, limited losses in crude. Brent crude oil futures were down 51 cents at $52 (£35) a barrel by 11:38 a.m. EDT (1638 BST), after setting a 2016 high of