Brent crude oil rose to around $61 a barrel on Friday as fighting in Libya and Iraq stoked output worries, while traders kept a close eye on Iran nuclear talks that could eventually bring more supply to world markets. Fighting has escalated in northeast Iraq where Islamic State militants have set fire to oilfields to deter Shi’ite militiamen and Iraqi soldiers from advancing. In Libya, worsening security conditions have led to the closure of 11 oilfields. Brent LCOc1 was up 50 cents a barrel at $60.98 by 0910 GMT (4:10 a.m. EST). U.S. light crude CLc1 was up 30 cents at $51.06 a barrel. Worries about oil supplies from the Middle East helped widen the premium for Brent over U.S. crude CL-LCO1=R by nearly $1 to around $10 on Thursday. “The Libyan and Iraqi oilfield skirmishes are worrying,” said Tamas Varga, oil analyst at London brokerage […]