BENGALURU (Reuters) -Oil prices rose on Tuesday on forecasts for a tighter gasoline market and a warning from the Saudi energy minister to speculators that raised the prospect of further OPEC+ output cuts. Both benchmarks extended gains to about 2% in post-settlement trade, after figures from the American Petroleum Institute (API) showed a large draw in crude and gasoline last week, according to market sources. If official inventories data from the Energy Information Administration, due on Wednesday, confirm the industry body's figures, U.S. gasoline inventories would have declined for the third straight week to their lowest pre-Memorial Day levels since 2014.