RIO DE JANEIRO, June 23 (Reuters) -

Brazil's Petrobras is closely monitoring

geopolitical tensions in the Middle East, which have pushed

global oil prices higher in recent weeks, but does not plan to

tweak domestic fuel prices for now, two company sources told

Reuters on Monday.

The sources, speaking on condition of anonymity, said that

the state-run oil giant is waiting for a sustained shift in

Brent crude prices before considering any price changes.