Ulster move to the top of the Pro12 table as a late Paddy Jackson penalty secures victory over the Dragons.
Jackson's 78th-minute kick put Ulster ahead for the first time in the game.
An Adam Hughes try helped the lively Dragons lead 10-0 before Sean Reidy's score cut the margin to 10-7 by half-time at Kingspan Stadium.
After a Carl Meyer try extended the Dragons lead, Ulster pressure yielded a penalty try, but the visitors looked set to hold on before Jackson's late kick.
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