BP Raises Dividend Again, Promises More Share Buybacks

* Ups dividend to 9.75 cents from 9.5 cents per share * Q1 profit $3.2 bln vs $3.1 bln consensus forecast * Rosneft contribution down 75 pct vs. Q4 2013 * Shares up 0.8 pct (Adds analyst comment, share price) By Sarah Young and Karolin Schaps LONDON, April 29