From ABC News:

The Illinois senator also benefited from a surge of new voters; 18 percent in North Carolina said it was their first time voting in a primary, and they favored him by a vast 68-26 percent.

Also, the exit polls show VERY strong African-American support…

Nearly unanimous support among African-Americans lifted Barack Obama to easy victory in North Carolina, while the Democratic presidential primary in Indiana played out against a more complex matrix of voter groups.

Blacks accounted for a third of North Carolina voters and 91 percent of them supported Obama in preliminary exit poll results. Against that voting bloc Hillary Clinton would have needed 70 percent of non-black voters; she fell well short, with 58 percent.

More as it develops…

Politics Obama Gets New Voters Almost 3 to 1 In North Carolina