ISTANBUL Oil prices edged up on Tuesday following the US announcement of additional tariff exemptions, a global oil production cut, and ongoing talks between Washington and Tehran. The international benchmark, Brent crude, increased by around 0.57%, trading at $64.92 per barrel at 10.22 am local time (0722 GMT), up from $64.55 at the previous session's close. US benchmark West Texas Intermediate (WTI) rose about 0.55%, settling at $61.50 per barrel, compared to its prior session close of $61.16.