Oil prices jump 6% to above $100 a barrel on US blockade of Iran
By Scott DiSavino NEW YORK, April 13 (Reuters) - Oil prices jumped about 6% to more than $100 a barrel on Monday after the U.S. military said it will blockade ships leaving Iran's ports nL6N40V09S, while Tehran threatened to retaliate against its Gulf neighbours' ports, raising fears of more energy