MOSCOW, May 7 (Reuters) - The Russian rouble slightly

strengthened against the U.S. dollar on Tuesday. By 0715 GMT

the rouble was 0.27% higher at 91.11 to the

dollar after trading in a range of 91.100 to 91.423.

Against the euro, the rouble rose 0.3%

to 98.15, while it gained 0.31% to 12.61 against the yuan

.

Brent crude oil, a global benchmark for Russia's

main export, rose 0.1% to $83.45 a barrel.

Russian stock indexes fell. The dollar-denominated RTS index

fell 0.33% to 1,182.32. The rouble-based MOEX Russian

index lost 0.49% to 3,419.31.

($1 = 91.1050 roubles)

(Reporting by Reuters)