Oil heads for 7% weekly gain after Saudi attacks

LONDON/SINGAPORE (Reuters) - Oil prices were on track for their biggest weekly jump since January, lifted by rising Middle East tensions after a key Saudi Arabian supply hub was knocked out by an attack last weekend. A Saudi-led coalition launched a military operation north of Yemen's port city of Hodeidah while the United States worked with Middle East and European nations to build a coalition to deter Iranian threats after the Saudi attack.Brent crude was up more than 7% from last Friday's..